提出 #36607077

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ソースコード 拡げる

#include <bits/stdc++.h>
#define st first
#define nd second
#define db double
#define re register
#define pb push_back
#define mk make_pair
#define int long long
#define ldb long double
#define pii pair<int, int>
#define ull unsigned long long
#define mst(a, b) memset(a, b, sizeof(a))
using namespace std;
inline int read()
{
  int s = 0, w = 1;
  char ch = getchar();
  while(ch < '0' || ch > '9') { if(ch == '-') w *= -1; ch = getchar(); }
  while(ch >= '0' && ch <= '9') s = s * 10 + ch - '0', ch = getchar();
  return s * w;
}
int n, Q;
map<pii, bool> mp;
signed main()
{
  n = read(), Q = read();
  while(Q--){
    int op = read(), x = read(), y = read();
    if(op == 1) mp[mk(x, y)] = true;
    if(op == 2) mp[mk(x, y)] = false;
    if(op == 3){
      if(mp[mk(x, y)] && mp[mk(y, x)]) puts("Yes");
      else puts("No");
    }
  }
  return 0;
}

提出情報

ジャッジ結果