Submission #25420250

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Source Code Expand

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <functional>
#include <cmath>
#include <map>
#define rep(i,n) for (int i=0;i<n;i++)

#define DENOM 1000000007

using namespace std;
using ll = long long;

int main(){
  map<string, map<string, int>> m ;
  int n ;
  cin >> n ;
  rep(i, n) {
    string s, t ;
    cin >> s >> t;
    auto it_s = m.find(s) ;
    if (it_s == m.end()) {
      map<string, int> tmp_m ;
      m[s] = tmp_m ;
    }
    auto it_t = m[s].find(t) ;
    if (it_t == m[s].end()) {
      m[s][t] = 1 ;
    } else {
      cout << "Yes" << endl ;
      return 0 ;
    }
  }
  cout << "No" << endl ;
  return 0 ;
}

Submission Info

Judge Result