pat1111-1120

1111 比较麻烦的最短路

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 505;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

struct Node{
  int to, nx, di, ti;
}E[N*N*2];
int head[N], tot;
void add(int fr, int to, int di, int ti) {
  E[tot].to = to; E[tot].di = di; E[tot].ti = ti; E[tot].nx = head[fr];
  head[fr] = tot ++;
}
vector<int> ans1; int Ans1;
vector<int> ans2; int Ans2;

struct Hode{
  int po, di, ti;
  Hode(int a=0, int b=0, int c=0):po(a), di(b), ti(c){}
  bool operator < (const Hode & T) const {
    if(di != T.di) return di > T.di;
    else return ti > T.ti;
  }
};
struct Tode{
  int po, di, ti;
  Tode(int a=0, int b=0, int c=0):po(a), di(b), ti(c){}
  bool operator < (const Tode & T) const {
    if(ti != T.ti) return ti > T.ti;
    else return di > T.di;
  }
};

int pre[N], vis[N];
int dis[N], tim[N];
void dfs1(int x, int tag) {
  if(x == tag) return;
  dfs1(pre[x], tag);
  ans1.push_back(x);
}
void dfs2(int x, int tag) {
  if(x == tag) return;
  dfs2(pre[x], tag);
  ans2.push_back(x);
}


void dij1(int s, int t) {
  priority_queue<Hode> Q;
  memset(dis, INF, sizeof(dis));
  memset(tim, INF, sizeof(tim));
  dis[s] = 0; tim[s] = 0;
  memset(vis, 0, sizeof(vis));
  Q.push(Hode(s, dis[s], tim[s]));

  while(!Q.empty()) {
    int po = Q.top().po; Q.pop();
    if(vis[po]) continue;
    vis[po] =  1;
    for(int i = head[po]; ~i; i = E[i].nx) {
      int to = E[i].to;
      if(dis[to] > dis[po] + E[i].di) {
        dis[to] = dis[po] + E[i].di;
        tim[to] = tim[po] + E[i].ti;
        pre[to] = po;
        Q.push(Hode(to, dis[to], tim[to]));
      }else if(dis[to] == dis[po] + E[i].di && tim[to] > tim[po] + E[i].ti) {
        tim[to] = tim[po] + E[i].ti;
        pre[to] = po;
        Q.push(Hode(to, dis[to], tim[to]));
      } 
    }
  }
//  printf("Distance = %d: %d", dis[t], s);
  ans1.push_back(s); Ans1 = dis[t];
  dfs1(t, s);
//  printf("
");
}
void dij2(int s, int t) {
  priority_queue<Tode> Q;
  memset(dis, INF, sizeof(dis));
  memset(tim, INF, sizeof(tim));
  dis[s] = 0; tim[s] = 0;
  memset(vis, 0, sizeof(vis));
  Q.push(Tode(s, dis[s], tim[s]));

  while(!Q.empty()) {
    int po = Q.top().po; Q.pop();
    if(vis[po]) continue;
    vis[po] =  1;
    for(int i = head[po]; ~i; i = E[i].nx) {
      int to = E[i].to;
      if(tim[to] > tim[po] + E[i].ti) {
        dis[to] = dis[po] + 1;
        tim[to] = tim[po] + E[i].ti;
        pre[to] = po;
        Q.push(Tode(to, dis[to], tim[to]));
      }else if(tim[to] == tim[po] + E[i].ti && dis[to] > dis[po] + 1) {
        dis[to] = dis[po] + 1;
        pre[to] = po;
        Q.push(Tode(to, dis[to], tim[to]));
      } 
    }
  }
  ans2.push_back(s); Ans2 = tim[t];
  dfs2(t, s); 
}
int main() {
  int n, m;
  while(~scanf("%d %d", &n, &m)) {
    ans1.clear(); ans2.clear();
    memset(head, -1, sizeof(head));
    tot = 0;

    for(int i = 0; i < m; ++i) {
      int a, b, c, d, e; scanf("%d %d %d %d %d", &a, &b, &c, &d, &e);
      add(a, b, d, e);
      if(!c) add(b, a, d, e);
    }
    int s,t; scanf("%d %d", &s, &t);

    dij1(s, t);
    dij2(s, t);
  //  if(s == t) while(1);

    int fl = 1;
    for(int i = 0; i < min(ans1.size(), ans2.size()); ++i) {
      if(ans1[i] != ans2[i]) {
        fl = 0; break;
      }
    }

    if(fl) {
      printf("Distance = %d; Time = %d: ", Ans1, Ans2);
      for(int i = 0; i < ans1.size(); ++i) {
        if(i) printf(" -> ");
        printf("%d", ans1[i]);
      } printf("
");
    }else {
      printf("Distance = %d: ", Ans1);
      for(int i = 0; i < ans1.size(); ++i) {
        if(i) printf(" -> ");
        printf("%d", ans1[i]);
      }
      printf("
Time = %d: ", Ans2);
      for(int i = 0; i < ans2.size(); ++i) {
        if(i) printf(" -> ");
        printf("%d", ans2[i]);
      }
      printf("
");
    }
  }
  return 0;
}

1112 gcd一下

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 505;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

char s[1005];
map<char, int> mp; int tot;
char table[40];
map<char, int> suc;
vector<int> vc[40];

int gcd(int a, int b) {
  if(b == 0) return a;
  else return gcd(b, a%b);
}
int main() {
  int n;
  tot = 0;
  for(char i = 'a'; i <= 'z'; ++i) mp[i] = ++tot, table[tot] = i;
  for(char i = '0'; i <= '9'; ++i) mp[i] = ++tot, table[tot] = i;
  mp['_'] = ++tot; table[tot] = '_';

  while(~scanf("%d", &n)) {
    suc.clear();

    for(int i = 0; i < 40; ++i) vc[i].clear();
    scanf("%s", s);
    int len = strlen(s);
    int tmp = 0;
    for(int i = 0; i <= len; ++i) {
      if(i && s[i] != s[i-1]) {
        vc[mp[s[i-1]]].push_back(tmp);
      //  printf("%c %d
", s[i-1], tmp);
        tmp = 0;
      }
      tmp ++;
    }

    for(int i = 1; i <= tot; ++i) {
      if(vc[i].size() > 0) {
      //  printf("%c ", table[i]); for(int j = 0; i < vc[i].size(); ++j) printf("%d ", vc[i][j]); printf("
");
        int tt = vc[i][0];
        for(int j = 1; j < vc[i].size(); ++j) {
          tt = gcd(tt, vc[i][j]);
        }

        if(tt % n == 0) {
      //    printf("%c
",table[i]);
          suc[table[i]] = 1;
        }
      }
    }

    tmp = 0;
    for(int i = 0; i < len; ++i) {
      if(suc[s[i]] > 0) {
        suc[s[i]] = -1;
        printf("%c", s[i]);
      }
    }  
    printf("
");

    for(int i = 0; i <= len; ++i) {
      if(i && s[i] != s[i-1]) {
        if(suc[s[i-1]] == -1) {
          for(int j = 0; j < tmp/n; ++j) printf("%c", s[i-1]);
        }
        else for(int j = 0; j < tmp; ++j) printf("%c", s[i-1]);
        tmp = 0;
      }
      tmp ++;
    }
    printf("
");
  }
  return 0;
}

1113

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int A[N];

ll Abs(ll x) {
  if(x < 0) return -x;
  else return x;
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    ll all = 0;
    for(int i = 0; i < n; ++i) {
      scanf("%d", &A[i]);
      all += A[i];
    }
    sort(A, A+n);
    ll tmp = 0;
    for(int i = 0; i < n/2; ++i) {
      tmp += A[i];
    }
    ll ans = Abs(tmp - (all-tmp));
    if(n % 2) {
      tmp += A[n/2];
      ans = max(ans, Abs(tmp - (all-tmp)) );
    }

    printf("%d %lld
", n%2, ans);


  }
  return 0;
}

1114 题意不好理解 其实就是并查集

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int f[N];
int find(int x) { return x == f[x]? x : f[x] = find(f[x]); }
void merge(int a, int b) {
  if(b == -1 || a == -1) return;
  int t1 = find(a); int t2 = find(b);

  if(t1 != t2) {
    if(t1 > t2) f[t1] = t2; else f[t2] = t1;
  }
}
int has[N];
int sett[N], area[N];
int cnt[N]; double avg_set[N], avg_area[N]; 
int ord[N];
int cmp(int x, int y) {
  if(avg_area[x] != avg_area[y]) return avg_area[x] > avg_area[y];
  else return x < y;
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    for(int i = 0; i < 1e5; ++i) f[i] = i;

    for(int i = 0; i < n; ++i) {
      int a,b,c; scanf("%d %d %d", &a, &b, &c);
      has[a] ++; has[b] ++; has[c] ++;
      merge(a, b); merge(a, c);
      int d; scanf("%d", &d);
      for(int j = 0; j < d; ++j) {
        int l; scanf("%d", &l);
        has[l] ++;
        merge(a, l);
      }
      scanf("%d %d", &sett[a], &area[a]);
    }
//    printf("hh
");

    for(int i = 0; i < 1e5; ++i) {
      if(has[i]) {
        int t1 = find(i);
        cnt[t1] ++; avg_set[t1] += sett[i]; avg_area[t1] += area[i];
      }  
    }
    int tot = 0;
    for(int i = 0; i < 1e5; ++i) {
      if(cnt[i]) {
        avg_set[i] /= cnt[i]; avg_area[i] /= cnt[i];
        ord[tot ++] = i;  
      }
    }
    sort(ord, ord + tot, cmp);
    printf("%d
", tot);
    for(int i = 0; i < tot; ++i) {
      printf("%04d %d %.3f %.3f
", ord[i], cnt[ord[i]], avg_set[ord[i]], avg_area[ord[i]]);
    }
  }
  return 0;
}

1115

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e3+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int num[N];
int L[N];
int R[N];
int root = 0;
void insert(int x, int nw) {
  if(root == -1) {
    root = x; return;
  }
  if(num[x] <= num[nw]) {
    if(L[nw]) insert(x, L[nw]);
    else L[nw] = x;
  }else {
    if(R[nw]) insert(x, R[nw]);
    else R[nw] = x;
  }
}
int cnt[N];
int Deep;
void dfs(int x, int dep) {
  Deep = max(Deep, dep);
  cnt[dep] ++;

  if(L[x]) dfs(L[x], dep+1);
  if(R[x]) dfs(R[x], dep+1);
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    root = -1;
    for(int i = 0; i < n; ++i) {
      scanf("%d", &num[i]);
      insert(i, root);
    }
    Deep = -1;
    dfs(root, 0);

    printf("%d + %d = %d
", cnt[Deep], cnt[Deep-1], cnt[Deep] + cnt[Deep-1]);
  }
  return 0;
}

1116

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int Rank[N];
int has[N];
int prime(int x) {
  if(x == 1) return 0;
  if(x == 2) return 1;
  for(int i = 2; i <= sqrt(x); ++i) {
    if(x % i == 0) 
      return 0;
  }
  return 1;
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    memset(has, 0, sizeof(has));
    for(int i = 0; i < n; ++i) {
      int a; scanf("%d", &a);
      Rank[a] = i+1;
    }
    int k; scanf("%d", &k);
    while(k--) {
      int a; scanf("%d", &a);
      if(has[a]) printf("%04d: Checked
", a);
      else if(Rank[a] == 0) printf("%04d: Are you kidding?
", a);
      else if(Rank[a] == 1) printf("%04d: Mystery Award
", a);
      else if(prime(Rank[a])) printf("%04d: Minion
", a);
      else printf("%04d: Chocolate
", a);
      if(Rank[a]) has[a] = 1;
    }
  }
  return 0;
}

1117这题题意也是扯淡啊，，，，

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int a[N];
int main() {
  int n;
  while(~scanf("%d", &n)) {
    for(int i = 0; i < n; ++i) scanf("%d", &a[i]);
    sort(a, a+n);
    a[n] = INF;

    int ans = -1;
    for(int i = 0; i < n; ++i) {
      if(a[i] != a[i+1]) {
        ans = max(ans, min(n-i-1, a[i+1]-1) );
      }
    }
    ans = max(ans, min(n, a[0]-1));
    printf("%d
", ans);
  }
  return 0;
}

1118

include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e4+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int fa[N];
int cnt[N];
int find(int x) { return x == fa[x]? x : fa[x] = find(fa[x]); }

int main() {
  int n;
  while(~scanf("%d", &n)) {
    memset(cnt, 0, sizeof(cnt));
    for(int i = 1; i <= 1e4; ++i) fa[i] = i;

    int m = -1;
    for(int i = 1; i <= n; ++i) {
      int a; scanf("%d", &a);
      int pre;
      if(a) {
        scanf("%d", &pre);
        m = max(m, pre);
      }
      for(int j = 1; j < a; ++j) {
        int b; scanf("%d", &b);
        m = max(m, b);
        int t1 = find(pre); int t2 = find(b);
        if(t1 != t2) fa[t2] = t1;
      }
    }
    for(int i = 1; i <= m; ++i) {
      cnt[find(i)] ++;
    }
    int all = 0; int maxx = -1;
    for(int i = 1; i <= m; ++i) {
      if(cnt[i]) {
        all ++;
        maxx = max(maxx, cnt[i]);
      }
    }
    printf("%d %d
", all, m);

    int k; scanf("%d", &k);
    for(int i = 0; i < k; ++i) {
      int a; int b; scanf("%d %d", &a, &b);
      int t1 = find(a); int t2 = find(b);
      if(t1 == t2) printf("Yes
");
      else printf("No
");
    }

  }
  return 0;
}

1119 主要对于先后序的概念需要掌握

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

int pre[N];
int post[N];
int L[N], R[N];
int root;

int fl = 1;

void solve(int _l, int _r, int l, int r, int rt) {
//  printf("%d %d %d %d %d
", _l,_r,l,r,rt);
  if(l > r) return;

  int ro = pre[_l];
  int pos = 0;
  for(int i = l; i <= r; ++i) {
    if(post[i] == ro) {
      pos = i; break;
    }
  }

  if(pos == l && pos != r) {
    L[rt] = post[pos];
    R[rt] = pre[_l+1];
    solve(_l+2, _r, l+1, r-1, pre[_l+1]);
  }else if(pos == r){
    fl = 0;
    L[rt] = post[pos];
    solve(_l+1, _r, l, r-1, post[pos]);
  }else {
  //  printf("hh %d
", rt);
    L[rt] = post[pos];
    int _pos = (pos-l) + _l;
  //  printf("%d
", _pos, pre[_pos]);
    R[rt] = pre[_pos+1];
    solve(_l+1, _pos, l, pos-1, post[pos]);
    solve(_pos+2, _r, pos+1, r-1, pre[_pos+1]);
  }

}


int nn = 0;
void dfs(int x) {
  if(L[x]) dfs(L[x]);
  if(!nn) nn = 1; else printf(" ");
  printf("%d", x);
  if(R[x]) dfs(R[x]);
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    memset(L, 0, sizeof(L));
    memset(R, 0, sizeof(R));
    nn = 0;

    for(int i = 1; i <= n; ++i) {
      scanf("%d", &pre[i]);
    }
    for(int i = 1; i <= n; ++i) {
      scanf("%d", &post[i]);
    }
    root = pre[1];
    solve(2, n, 1, n-1, root);

    if(fl) printf("Yes
");
    else printf("No
");
    dfs(root);
    printf("
");
  }
  return 0;
}

1120

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e4+5;
const int INF = 0x3f3f3f3f;
#define MP(x, y) make_pair(x, y)

map<int, int> mp;
map<int, int>::iterator it;

void solve(int x) {
  int tt = 0;
  while(x) {
    tt += x%10;
    x /= 10;
  }
  mp[tt] ++;
}
int main() {
  int n;
  while(~scanf("%d", &n)) {
    mp.clear();

    for(int i = 0; i < n; ++i) {
      int a; scanf("%d", &a);
      solve(a);
    }

    int cnt = 0;
    for(it = mp.begin(); it != mp.end(); ++it) {
      if(it->second > 0) {
        cnt ++;
      }
    }
    printf("%d
", cnt);
    int fl = 0;
    for(it = mp.begin(); it != mp.end(); ++it) {
      if(it->second > 0) {
        if(!fl) fl = 1; else printf(" ");
        printf("%d", it->first);
      }
    } printf("
");


  }
  return 0;
}