Submission #503299

#	Time	Username	Problem	Language	Result	Execution time	Memory
503299		MurotY	Three Friends (BOI14_friends)	C++14	35 / 100	1099 ms	6340 KiB

friends

#include <bits/stdc++.h>
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ff first
#define ll long long
#define ss second
using namespace std;
const int N=5*1e5+1;
ll t[N], x[N],  y[N], v[N];
ll dar(ll a, ll b){
	ll res=1;
	for (int i=1;i<=b;i++) res*=a;
	return res;
}
int main()
{
     int n, ans=0;
     cin >> n;
     string s, ans1;
     cin >> s;
     
     if (n % 2 == 0){
     	cout << "NOT POSSIBLE";
     	return 0;
	}
     for (int i=0;i<n;i++){
     	string s1=s, s2=s;
     	s1.erase(i, 1); s2.erase(i, 1);
     	s1.erase(n/2, n);
     	s2.erase(0, n/2);
     	
     	if (s1 == s2 and ans1 != "" and ans1 != s1){
     		cout << "NOT UNIQUE";
     		return 0;
		}
		if (s1 == s2){
			ans++;
			ans1=s1;
		}
	}
	if (ans == 0) cout << "NOT POSSIBLE";
	else cout << ans1;
	return 0;
}

• Subtask 1: 35 / 35
• Subtask 2: 0 / 65