855A - Tom Riddle's Diary - CodeForces Solution

brute force implementation strings *800

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Python Code: 

n = int(input())
dt = {}
for i in range(n):
    s= input()
    if s in dt:
        print("YES")
    else:
        print("NO")
        dt[s]=True

C++ Code: 

#include<bits/stdc++.h>
using namespace std;
// void init_code(){
// 	#ifndef ONLINE_JUDGE
// 	freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
// #endif
// }
int main(){
  //init_code();
   int n;
   cin>>n;
   map<string, bool>vis;
   while(n--){
	string s;
	cin>>s;
	if(vis[s]==1) cout<< "YES"<<endl;
	else cout<<"NO"<<endl;;
	vis[s]=1;
   }
}


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