Submission #896983

#	Time	Username	Problem	Language	Result	Execution time	Memory
896983		Nexus	Three Friends (BOI14_friends)	C++17	0 / 100	1036 ms	13116 KiB

friends

#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <math.h>
#include <string>
#include <algorithm>
#include <random>
#include <iomanip>
#include <utility>
#include <cstring>
//#include <bits/stdc++.h>

#define ll long long
#define s .size()

using namespace std;

const ll N=1e5+9,M=1e18+9,mod=1e9+7;
//cout<<fixed<<setprecision(6)<<

ll n,x,y;
vector<string>v;
string a,b,c,d,e,ans;

bool ok(){
	y=d.size()/2,e="";
	for(ll i=0;i<y;++i)
	if(d[i]!=d[i+y])return 0;
	else e+=d[i];
	ans=e;
	return 1;
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	
	cin>>n>>a;
	if(!(n%2))goto end;
	for(ll i=0;i<n;++i){
		c="";
		for(ll j=i+1;j<n;++j)c+=a[j];
		d=b+c;
		if(ok())++x;
		if(x>1)break;
		b+=a[i];
	}
	end:
	if(!x)cout<<"NOT POSSIBLE";
	else if(x>1)cout<<"NOT UNIQUE";
	else cout<<ans;
}

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