Submission #106104

#	Time	Username	Problem	Language	Result	Execution time	Memory
106104		sofhiasouza	Three Friends (BOI14_friends)	C++14	100 / 100	123 ms	11104 KiB

friends

#include <bits/stdc++.h>
#define pb push_back
using namespace std;
int main()
{
	int n, resp1 = 1, resp2 = 1;
	string s;
	cin >> n;
	cin >> s;
	
	if(n%2 == 0)
	{
		cout << "NOT POSSIBLE\n";
		return 0;
	}
	
	int meio = n/2;
	string a = "", b = "", s1 = "", s2 =  "";
	for(int i = 0 ; i < n ; i++)
	{
		if(i < meio) a.pb(s[i]);
		else  b.pb(s[i]);	
	}
	
	int v = -1, j = 0;
	for(int i = 0 ; i < meio ; i++)
	{
		if(a[i] != b[j])
		{
			if(v == -1 and a[i] == b[++j]) v = i;
			else
			{
				resp1 = 0;
				break;
			}
		}
		s1.pb(a[i]);
		j++;
	}
	
	v = -1, j = 0;
	a = "", b = "";
	for(int i = 0 ; i < n ; i++)
	{
		if(i <= meio) b.pb(s[i]);
		else a.pb(s[i]);	
	}
	
	for(int i = 0 ; i < meio ; i++)
	{
		if(a[i] != b[j])
		{
			if(v == -1 and a[i] == b[++j]) v = i;
			else
			{
				resp2 = 0;
				break;
			}
		}
		s2.pb(a[i]);
		j++;
	}
	
	if(!resp1 and !resp2) cout << "NOT POSSIBLE\n";
	else if((resp1 and !resp2) or (resp1 and resp2 and s1 == s2)) cout << s1 << endl;
	else if(resp2 and !resp1) cout << s2 << endl;
	else cout << "NOT UNIQUE\n";
}

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