• 博弈题目小结


      关于入门资料,推荐看<这里>,取火柴的那10个定理必须理解。

    五篇国家集训队论文:

      张一飞: 《由感性认识到理性认识——透析一类搏弈游戏的解答过程 》
      王晓珂:《 解析一类组合游戏》
      方展鹏:《浅谈如何解决不平等博弈问题》
      贾志豪:《组合游戏略述——浅谈SG游戏的若干拓展及变形》
      曹钦翔:《从“k倍动态减法游戏”出发 探究一类组合游戏问题》

      下面是题目总结:

    1.HDU 1404  预处理,推出所有情况的胜负情况。

      1 //STATUS:C++_AC_468MS_4140KB
      2 #include <functional>
      3 #include <algorithm>
      4 #include <iostream>
      5 //#include <ext/rope>
      6 #include <fstream>
      7 #include <sstream>
      8 #include <iomanip>
      9 #include <numeric>
     10 #include <cstring>
     11 #include <cassert>
     12 #include <cstdio>
     13 #include <string>
     14 #include <vector>
     15 #include <bitset>
     16 #include <queue>
     17 #include <stack>
     18 #include <cmath>
     19 #include <ctime>
     20 #include <list>
     21 #include <set>
     22 #include <map>
     23 using namespace std;
     24 //using namespace __gnu_cxx;
     25 //define
     26 #define pii pair<int,int>
     27 #define mem(a,b) memset(a,b,sizeof(a))
     28 #define lson l,mid,rt<<1
     29 #define rson mid+1,r,rt<<1|1
     30 #define PI acos(-1.0)
     31 //typedef
     32 typedef long long LL;
     33 typedef unsigned long long ULL;
     34 //const
     35 const int N=1000010;
     36 const int INF=0x3f3f3f3f;
     37 const int MOD=100000,STA=8000010;
     38 const LL LNF=1LL<<60;
     39 const double EPS=1e-8;
     40 const double OO=1e15;
     41 const int dx[4]={-1,0,1,0};
     42 const int dy[4]={0,1,0,-1};
     43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
     44 //Daily Use ...
     45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
     46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
     47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
     48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
     49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
     50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
     51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
     52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
     53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
     54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
     55 //End
     56 
     57 int sta[N],ten[10];
     58 int n;
     59 
     60 int dfs(int u,int w)
     61 {
     62     if(!w || u/ten[w-1]==0)return 1;
     63     if(sta[u]!=-1)return sta[u];
     64     int i,j,t,v;
     65     for(i=w-1;i>=0;i--){
     66         t=u/ten[i]%10;
     67         if(t==0){
     68             v=u/ten[i+1];
     69             if(dfs(v,w-i-1)==0)return sta[u]=1;
     70         }
     71         v=u-ten[i];
     72         for(;t;t--,v-=ten[i])
     73             if(dfs(v,w)==0)return sta[u]=1;
     74     }
     75     return sta[u]=0;
     76 }
     77 
     78 int getw(int a)
     79 {
     80     if(a/10==0)return 1;
     81     if(a/100==0)return 2;
     82     if(a/1000==0)return 3;
     83     if(a/10000==0)return 4;
     84     if(a/100000==0)return 5;
     85     return 6;
     86 }
     87 
     88 int main()
     89 {
     90   //  freopen("in.txt","r",stdin);
     91     int i,j,len;
     92     char s[10];
     93     for(i=ten[0]=1;i<8;i++)ten[i]=ten[i-1]*10;
     94     mem(sta,-1);sta[0]=1;
     95     for(i=1;i<1000000;i++){
     96         if(sta[i]==-1)dfs(i,getw(i));
     97     }
     98     while(~scanf("%s",s))
     99     {
    100         len=strlen(s);
    101         for(i=n=0;i<len;i++)n+=(s[len-i-1]-'0')*ten[i];
    102 
    103         printf("%s
    ",(s[0]=='0' || sta[n])?"Yes":"No");
    104     }
    105     return 0;
    106 }
    View Code

    2.HDU 1907  尼姆博奕,最后取玩的位loser,必败态为:T2,S0;必胜态为:S2,S1,T0;

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=110;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=100000,STA=8000010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int T,n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int i,j,sg,a,cou;
    63     scanf("%d",&T);
    64     while(T--)
    65     {
    66         scanf("%d",&n);
    67         sg=cou=0;
    68         while(n--){
    69             scanf("%d",&a);
    70             sg^=a;
    71             if(a>1)cou++;
    72         }
    73         if((!cou&&sg) || (cou>=2&&!sg))
    74             printf("Brother
    ");
    75         else printf("John
    ");
    76     }
    77     return 0;
    78 }
    View Code

    3.HDU 2509  和上一题一样。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=110;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=100000,STA=8000010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int i,j,sg,a,cou;
    63     while(~scanf("%d",&n))
    64     {
    65         sg=cou=0;
    66         while(n--){
    67             scanf("%d",&a);
    68             sg^=a;
    69             if(a>1)cou++;
    70         }
    71         if((!cou&&sg) || (cou>=2&&!sg))
    72             printf("No
    ");
    73         else printf("Yes
    ");
    74     }
    75     return 0;
    76 }
    View Code

    4.HDU 1517  区间的博弈,从最大的范围推到,把每个区间的胜负情况推到出来:[n,+∞](T态) —> [(n+1)/2,n-1](S态,表示为[n,m])  —> [(n+8)/9,n-1](T态)—>......。还可以HASH+DFS暴力搞出来。

      1 //STATUS:C++_AC_32MS_264KB
      2 #include <functional>
      3 #include <algorithm>
      4 #include <iostream>
      5 //#include <ext/rope>
      6 #include <fstream>
      7 #include <sstream>
      8 #include <iomanip>
      9 #include <numeric>
     10 #include <cstring>
     11 #include <cassert>
     12 #include <cstdio>
     13 #include <string>
     14 #include <vector>
     15 #include <bitset>
     16 #include <queue>
     17 #include <stack>
     18 #include <cmath>
     19 #include <ctime>
     20 #include <list>
     21 #include <set>
     22 #include <map>
     23 using namespace std;
     24 //using namespace __gnu_cxx;
     25 //define
     26 #define pii pair<int,int>
     27 #define mem(a,b) memset(a,b,sizeof(a))
     28 #define lson l,mid,rt<<1
     29 #define rson mid+1,r,rt<<1|1
     30 #define PI acos(-1.0)
     31 //typedef
     32 typedef long long LL;
     33 typedef unsigned long long ULL;
     34 //const
     35 const int N=100000010;
     36 const int INF=0x3f3f3f3f;
     37 const int MOD=5000,STA=100010;
     38 const LL LNF=1LL<<60;
     39 const double EPS=1e-8;
     40 const double OO=1e15;
     41 const int dx[4]={-1,0,1,0};
     42 const int dy[4]={0,1,0,-1};
     43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
     44 //Daily Use ...
     45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
     46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
     47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
     48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
     49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
     50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
     51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
     52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
     53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
     54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
     55 //End
     56 
     57 struct Hash
     58 {
     59     int i,size,next[STA];
     60     int f[MOD],sg[STA];
     61     LL sta[STA];
     62     void init(){
     63         size=0;
     64         mem(f,-1);
     65     }
     66     int find(LL a){
     67         int s=a%MOD;
     68         for(i=f[s];i!=-1;i=next[i]){
     69             if(sta[i]==a){
     70                 return sg[i];
     71             }
     72         }
     73         sta[size]=a;sg[size]=0;
     74         next[size]=f[s];
     75         f[s]=size++;
     76         return -1;
     77     }
     78     void update(LL a){
     79         int s=a%MOD;
     80         for(i=f[s];i!=-1 && sta[i]!=a;i=next[i]);
     81         sg[i]=1;
     82     }
     83 }hs;
     84 
     85 LL n;
     86 
     87 int dfs(LL u)
     88 {
     89     if(u>=n)return 0;
     90     int i,t,sg,ret=0;
     91     if((t=hs.find(u))!=-1)return t;
     92     for(i=2;i<=9;i++){
     93         sg=dfs(u*i);
     94         if(!sg)ret=1,hs.update(u);
     95     }
     96     return ret;
     97 }
     98 
     99 int main()
    100 {
    101  //   freopen("in.txt","r",stdin);
    102     int i,j;
    103     while(~scanf("%I64d",&n))
    104     {
    105         hs.init();
    106         printf("%s wins.
    ",dfs((LL)1)?"Stan":"Ollie");
    107     }
    108     return 0;
    109 }
    View Code

    5.HDU 1849  尼姆博奕模型。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=100000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int main()
    58 {
    59  //   freopen("in.txt","r",stdin);
    60     int n,a,sg;
    61     while(~scanf("%d",&n) && n)
    62     {
    63         sg=0;
    64         while(n--){
    65             scanf("%d",&a);
    66             sg^=a;
    67         }
    68 
    69         printf("%s Win!
    ",sg?"Rabbit":"Grass");
    70     }
    71     return 0;
    72 }
    View Code

    6.HDU 2188  巴什博奕模型。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=100000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int T,n,m;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     scanf("%d",&T);
    63     while(T--)
    64     {
    65         scanf("%d%d",&n,&m);
    66         printf("%s
    ",n%(m+1)?"Grass":"Rabbit");
    67     }
    68     return 0;
    69 }
    View Code

    7.HDU 1851  n堆的巴什博奕,用SG函数。

     1 //STATUS:C++_AC_15MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=100000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int T,n,m;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int a,sg;
    63     scanf("%d",&T);
    64     while(T--)
    65     {
    66         scanf("%d",&n);
    67         sg=0;
    68         while(n--){
    69             scanf("%d%d",&a,&m);
    70             sg^=a%(m+1);
    71         }
    72         printf("%s
    ",sg?"No":"Yes");
    73     }
    74     return 0;
    75 }
    View Code

    8.HDU 2897  有下界限制的巴什博奕。

     1 //STATUS:C++_AC_62MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=100000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int T,n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int x,y,a,p,q,sg;
    63     while(~scanf("%d%d%d",&a,&p,&q))
    64     {
    65         sg=0;
    66         x=1,y=p;
    67         while(a<x || a>y){
    68             x=y+1;
    69             if(sg)y+=p;
    70             else y+=q;
    71             sg^=1;
    72         }
    73         printf("%s
    ",sg?"WIN":"LOST");
    74     }
    75     return 0;
    76 }
    View Code

    9.HDU 2516  找规律,S态为Fibonacci数列。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=110;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int f[N];
    58 int n;
    59 
    60 int main()
    61 {
    62  //   freopen("in.txt","r",stdin);
    63     int i,ok;
    64     f[0]=f[1]=1;
    65     for(i=2;i<46;i++)f[i]=f[i-1]+f[i-2];
    66     while(~scanf("%d",&n) && n)
    67     {
    68         ok=1;
    69         for(i=0;i<46;i++)if(f[i]==n){ok=0;break;}
    70         printf("%s win
    ",ok?"First":"Second");
    71     }
    72     return 0;
    73 }
    View Code

    10.HDU 2149  区间博弈,巴什博奕。

     1 //STATUS:C++_AC_0MS_232KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=100000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int n,m;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int i,j,sg,lx,ly,x,y;
    63     while(~scanf("%d%d",&m,&n))
    64     {
    65         sg=1;
    66         lx=m;ly=m+n;
    67         x=Max(m-n,0);y=Max(0,m-1);
    68         while(0<x){
    69             lx=x,ly=y;
    70             if(sg)x=y=x-1;
    71             else {
    72                 y=x-1;x-=n;
    73             }
    74             sg^=1;
    75         }
    76 
    77         if(sg){
    78             printf("%d",lx);
    79             for(i=lx+1;i<=ly && i<=n;i++)
    80                 printf(" %d",i);
    81         }
    82         else printf("none");
    83         putchar('
    ');
    84     }
    85     return 0;
    86 }
    View Code

    11.HDU 1850  求尼姆博弈开始必胜天态次数,先求出SG函数,然后遍历SG^num[i]==0的次数。

     1 //STATUS:C++_AC_0MS_232KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=1000010;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int num[N];
    58 int n;
    59 
    60 int main()
    61 {
    62  //   freopen("in.txt","r",stdin);
    63     int i,j,sg,w,ans;
    64     while(~scanf("%d",&n) && n)
    65     {
    66         sg=0;
    67         for(i=0;i<n;i++){
    68             scanf("%d",&num[i]);
    69             sg^=num[i];
    70         }
    71         if(sg){
    72             for(i=0;i<31;i++)
    73                 if(sg&(1<<i))w=(1<<i);
    74             for(i=ans=0;i<n;i++){
    75                 if(num[i]&w)ans++;
    76             }
    77         }
    78 
    79         printf("%d
    ",sg?ans:0);
    80     }
    81     return 0;
    82 }
    View Code

    12.HDU 4023  贪心+博弈,贪心的细想。仔细观察15钟棋盘的布局,然后把它们分类:

        15 对双方的是一样的

        3,4,5,6 分偏向Bob和偏向Alice

        11,12,13,14 偏向双方

        7,9,9,10 如果一方得到一个,另一方也能得到一个

        1,2 属于各自的。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=20;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int num[N],g[5];
    58 int T,n=15;
    59 
    60 int main()
    61 {
    62  //   freopen("in.txt","r",stdin);
    63     int i,j,cou[2],w,ca=1;
    64     scanf("%d",&T);
    65     while(T--)
    66     {
    67         for(i=1;i<=n;i++)
    68             scanf("%d",&num[i]);
    69         g[1]=num[15];
    70         g[2]=num[5]+num[6]-num[3]-num[4];
    71         g[3]=num[11]+num[12]+num[13]+num[14];
    72         g[4]=num[7]+num[8]-num[9]-num[10];
    73      //   printf("%d %d %d %d
    ",g[1],g[2],g[3],g[4]);
    74         cou[0]=num[1]*2;cou[1]=num[2]*2;
    75         w=0;
    76         if(g[1]&1){cou[w]++;w^=1;}
    77         if(g[2]){
    78             if(g[2]>0)cou[0]+=g[2]/2;
    79             else cou[1]+=(-g[2])/2;
    80             if(g[2]&1){
    81                 if((!w && g[2]>0) || (w && g[2]<0))cou[w]++;
    82                 w^=1;
    83             }
    84         }
    85         if(g[3]&1)w^=1;
    86         if(g[4]){
    87             if(g[4]>0)cou[0]+=g[4]/2;
    88             else cou[1]+=(-g[4])/2;
    89             if(g[4]&1){
    90                 if((w && g[4]>0) || (!w && g[4]<0))cou[!w]++;
    91                 w^=1;
    92             }
    93         }
    94 
    95         printf("Case #%d: %s
    ",ca++,((cou[0]>cou[1]) || (cou[0]==cou[1] && w))?"Alice":"Bob");
    96     }
    97     return 0;
    98 }
    View Code

    13.HDU 1847  SG函数找找规律就出来了。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=20;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     while(~scanf("%d",&n))
    63     {
    64         printf("%s
    ",n%3?"Kiki":"Cici");
    65     }
    66     return 0;
    67 }
    View Code

    14.HDU 2147  转化为尼姆博弈。

     1 //STATUS:C++_AC_15MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=20;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     int a,b;
    63     while(scanf("%d%d",&a,&b) && a && b)
    64     {
    65         printf("%s
    ",(a&1 && b&1)?"What a pity!":"Wonderful!");
    66     }
    67     return 0;
    68 }
    View Code

    15.HDU 1525  简单博弈推导题,考虑到经过的数是一样的。

     1 //STATUS:C++_AC_15MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=210;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int main()
    58 {
    59   //  freopen("in.txt","r",stdin);
    60     int ok,a,b,w;
    61     while(~scanf("%d%d",&a,&b) && (a||b))
    62     {
    63         ok=w=0;
    64         while(a && b){
    65             if(a>b)swap(a,b);
    66             if(b/a>=2){
    67                 if(!w)ok=1;
    68                 else ok=2;
    69                 break;
    70             }
    71             b-=b/a*a;
    72             w^=1;
    73         }
    74         if(!ok){
    75             if(w)ok=1;
    76             else ok=2;
    77         }
    78 
    79         printf("%s wins
    ",ok==1?"Stan":"Ollie");
    80     }
    81     return 0;
    82 }
    View Code

    16.HDU 3032  可以将一堆石子分成多堆——Multi-SG游戏,将SG函数适当变形,然后找规律。

     1 //STATUS:C++_AC_0MS_228KB
     2 #include <functional>
     3 #include <algorithm>
     4 #include <iostream>
     5 //#include <ext/rope>
     6 #include <fstream>
     7 #include <sstream>
     8 #include <iomanip>
     9 #include <numeric>
    10 #include <cstring>
    11 #include <cassert>
    12 #include <cstdio>
    13 #include <string>
    14 #include <vector>
    15 #include <bitset>
    16 #include <queue>
    17 #include <stack>
    18 #include <cmath>
    19 #include <ctime>
    20 #include <list>
    21 #include <set>
    22 #include <map>
    23 using namespace std;
    24 //using namespace __gnu_cxx;
    25 //define
    26 #define pii pair<int,int>
    27 #define mem(a,b) memset(a,b,sizeof(a))
    28 #define lson l,mid,rt<<1
    29 #define rson mid+1,r,rt<<1|1
    30 #define PI acos(-1.0)
    31 //typedef
    32 typedef long long LL;
    33 typedef unsigned long long ULL;
    34 //const
    35 const int N=210;
    36 const int INF=0x3f3f3f3f;
    37 const int MOD=5000,STA=100010;
    38 const LL LNF=1LL<<60;
    39 const double EPS=1e-8;
    40 const double OO=1e15;
    41 const int dx[4]={-1,0,1,0};
    42 const int dy[4]={0,1,0,-1};
    43 const int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
    44 //Daily Use ...
    45 inline int sign(double x){return (x>EPS)-(x<-EPS);}
    46 template<class T> T gcd(T a,T b){return b?gcd(b,a%b):a;}
    47 template<class T> T lcm(T a,T b){return a/gcd(a,b)*b;}
    48 template<class T> inline T lcm(T a,T b,T d){return a/d*b;}
    49 template<class T> inline T Min(T a,T b){return a<b?a:b;}
    50 template<class T> inline T Max(T a,T b){return a>b?a:b;}
    51 template<class T> inline T Min(T a,T b,T c){return min(min(a, b),c);}
    52 template<class T> inline T Max(T a,T b,T c){return max(max(a, b),c);}
    53 template<class T> inline T Min(T a,T b,T c,T d){return min(min(a, b),min(c,d));}
    54 template<class T> inline T Max(T a,T b,T c,T d){return max(max(a, b),max(c,d));}
    55 //End
    56 
    57 int T,n;
    58 
    59 int main()
    60 {
    61  //   freopen("in.txt","r",stdin);
    62     LL a,sg;
    63     scanf("%d",&T);
    64     while(T--)
    65     {
    66         scanf("%d",&n);
    67         sg=0;
    68         while(n--){
    69             scanf("%I64d",&a);
    70             if(a%4==0)sg^=a-1;
    71             else if(a%4==3)sg^=a+1;
    72             else sg^=a;
    73         }
    74 
    75         printf("%s
    ",sg?"Alice":"Bob");
    76     }
    77     return 0;
    78 }
    View Code
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  • 原文地址:https://www.cnblogs.com/zhsl/p/3176518.html
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