Submission #1191932

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191932		Yusif_Nazarli	Three Friends (BOI14_friends)	C++20	0 / 100	1094 ms	6288 KiB

friends

// author: Yusif_Nazarli

#pragma GCC optimize("O3")
#include "bits/stdc++.h"
#include "ext/pb_ds/assoc_container.hpp"

#define Mor_Te ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define gcd __gcd
#define intt long long
#define pb push_back
#define emb emplace_back
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define F first
#define S second
#define pii pair<intt ,intt>
#define reset_map(m) for(auto &[k , v] : m) v = 0;


using namespace std;
using namespace __gnu_pbds;

template <typename T>
using indexed_set = tree<T , null_type , less<T> , rb_tree_tag , tree_order_statistics_node_update>;

const intt sz = 1e5 + 5;
const intt INF = 1e18;


void Yusiff(){
    intt n; cin >> n;
    string s; cin >> s;
    set<string> st;
    for(intt i = 0; i < n; i++){
        string temp = s;
        temp.erase(i , 1);
        if(temp.substr(0 , temp.size() / 2) == temp.substr(temp.size() / 2 , temp.size() / 2)){
            st.insert(temp.substr(0 , temp.size()));
        }
    }
    if(st.size() == 0){
        cout << "NOT POSSIBLE" << '\n';
    } else if(st.size() == 1){
        cout << *st.begin() << '\n';
    } else{
        cout << "NOT UNIQUE" << '\n';
    }
}

signed main(){
    int t = 1;
    //cin >> t;
    for(intt i = 1; i <= t; i++){
      //  cout << "Case " << i << ": ";
        Yusiff();
    }
}

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