Submission #742000

#	Time	Username	Problem	Language	Result	Execution time	Memory
742000		MODDI	Three Friends (BOI14_friends)	C++14	35 / 100	1061 ms	8168 KiB

friends

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int n;
string str;
int main(){
	cin>>n>>str;
	int cnt = 0;
	map<string, int> ans;
	string out;
	for(int i = 0; i < n; i++){
		string l, r;
		int sz = n/2;
		for(int j = 0; j < n; j++){
			if(j == i)	continue;
			else if(l.size() < sz)	l.pb(str[j]);
			else r.pb(str[j]);
		}
		bool ok = true;
		for(int j = 0; j < l.size(); j++){
			if(l[j] != r[j]){
				ok = false;break;
			}
		}
		if(ok){
			if(ans[l] == 0){
//				cout<<l<<endl;
				out = l;
				cnt++;
				ans[l] = 1;
			}
		}
	}
	if(cnt == 1){
		cout<<out<<endl;
	}
	else if(cnt > 1)	cout<<"NOT UNIQUE"<<endl;
	else cout<<"NOT POSSIBLE"<<endl;
	return 0;
}

Compilation message (stderr)

friends.cpp: In function 'int main()':
friends.cpp:22:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   22 |    else if(l.size() < sz) l.pb(str[j]);
      |            ~~~~~~~~~^~~~
friends.cpp:26:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for(int j = 0; j < l.size(); j++){
      |                  ~~^~~~~~~~~~

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