poj1082-Calendar Game-博弈/sg

sg大法好 无脑sg即可，不用去找规律了。

/*--------------------------------------------------------------------------------------*/

#include <algorithm>
#include <iostream>
#include <cstring>
#include <ctype.h>
#include <cstdlib>
#include <cstdio>
#include <vector>
#include <string>
#include <queue>
#include <stack>
#include <cmath>
#include <set>
#include <map>

//debug function for a N*M array
#define debug_map(N,M,G) printf("
");for(int i=0;i<(N);i++)
{for(int j=0;j<(M);j++){
printf("%d",G[i][j]);}printf("
");}
//debug function for int,float,double,etc.
#define debug_var(X) cout<<#X"="<<X<<endl;
#define LL long long
const int INF = 0x3f3f3f3f;
const LL LLINF = 0x3f3f3f3f3f3f3f3f;
const double eps = 1e-8;
/*--------------------------------------------------------------------------------------*/
using namespace std;

int N,M,T;
int days[] = {0,31,28,31,30,31,30,31,31,30,31,30,31};
int mem[2100][15][40];

bool leap(int yy)
{
    return ((yy%4==0 && yy%100!=0)|| (yy%100==0 && yy%400==0));
}

int sg(int yy,int mm,int dd,int dep)
{
    //for(int i=0;i<dep;i++) printf("-");
    //printf("%d:%d:%d
",yy,mm,dd);

    if(yy==2001 && mm==11 && dd==4) return 0;
    if(yy > 2001 || (yy==2001&&mm>11) || (yy==2001&&mm==11&&dd>4)) return -1;
    if(mem[yy][mm][dd] != -1) return mem[yy][mm][dd];
    set<int> st;
    //+1 month
    if(mm==1 && dd==28 && leap(yy)) st.insert(sg(yy,2,28,dep+1));
    else if(days[(mm==12 ? 1 : mm+1) ] >= dd ) st.insert(sg(mm==12?yy+1:yy,mm==12?1:mm+1,dd,dep+1) );

    //+1 day
    if(mm == 12 && dd == 31) st.insert(sg(yy+1,1,1,dep+1));
    else if(mm==2 && dd == 27 && leap(yy)) st.insert(sg(yy,2,28,dep+1));
    else if(mm==2 && dd == 27 && !leap(yy)) st.insert(sg(yy,3,1,dep+1));
    else if(dd == days[mm]) st.insert(sg(yy,mm+1,1,dep+1));
    else st.insert(sg(yy,mm,dd+1,dep+1));

    int g = 0;
    while(st.find(g) != st.end()) g++;
    return mem[yy][mm][dd] = g;
}

int main()
{
    //freopen("output.txt","w",stdout);
    scanf("%d",&T);
    memset(mem,-1,sizeof mem);
    while(T--)
    {
        int yy,mm,dd;
        scanf("%d%d%d",&yy,&mm,&dd);
        printf("%s
",sg(yy,mm,dd,0)?"YES":"NO");
    }
}