Submission #872733

#	Time	Username	Problem	Language	Result	Execution time	Memory
872733		binh192004	Utrka (COCI14_utrka)	C++17	80 / 80	91 ms	14764 KiB

utrka

#include <bits/stdc++.h>
#include <iostream>
#include <stack>
#include <vector>
#include <set>
#include <queue>
#include <string>
#include <algorithm>
#include <unordered_map>
#include <unordered_set>
#include <map>

using namespace std;

typedef long double ld;
mt19937_64 rnd(chrono::steady_clock::now().time_since_epoch().count());
//#define int long long
#define double long double
#define all(x) (x).begin(), (x).end()
#define pii pair<int, int>
#define lowbit(x) x & (-x);
#define inf 1e18
#define _inf -1e18
#define pyes cout << "YES" << endl
#define pno cout << "NO" << endl
#define inv(a) for (int& x: a) cin >> x;
#define llv(a) for (ll& x: a) cin >> x;
#define pri(a) for (int& x: a) cout << x << '\n'
int const MOD = 998244353;
int const lg = 20;
int const block = 500;
// int block;
int const MAX = 3e5 + 1, N = 4000;
int n, m, q, k;

void bexuyen67() {
      cin >> n;
      vector<string> s(n);
      map<string, int> mp;
      for (string& x: s){
            cin >> x;
            mp[x]++;
      }
      for (int i = 1; i < n; i++){
            string x;
            cin >> x;
            mp[x]--;
      }
      for (auto [ss, cnt]: mp){
            if (cnt){
                  cout << ss;
                  return;
            }
      }
}

signed main() {
#ifdef binhball
      freopen("input.txt", "r", stdin);
      freopen("output.txt", "w", stdout);
#endif
      cin.tie(0)->sync_with_stdio(0);
      cout << fixed << setprecision(15);
      int t = 1;
//      cin >> t;
      while (t--)
            bexuyen67();
}

• Subtask 1: 80 / 80