Submission #17422

#	Time	Username	Problem	Language	Result	Execution time	Memory
17422		choyi0521	Three Friends (BOI14_friends)	C++98	0 / 100	124 ms	3676 KiB

friends

#include<iostream>
using namespace std;
const int MAX_N=2000001;
int n;
char str[MAX_N+1];
int main(){
	cin >> n >> str;
	int i,tmp=0;
	for(i=0; i<n/2 && str[i]==str[n/2+i]; i++);
	for(; i<n/2 && str[i]==str[n/2+1+i]; i++);
	if(i==n/2) tmp+=1;
	for(i=0; i<n/2 && str[i]==str[n/2+1+i]; i++);
	for(; i<n/2 && str[i+1]==str[n/2+1+i]; i++);
	if(i==n/2) tmp+=2;
	if(tmp==3 && str[0]!=str[n/2]) tmp--;
	if(tmp==0 || n%2==0) cout<<"NOT POSSIBLE";
	else if(tmp==1)
		for(int i=0; i<n/2; i++) cout<<str[i];
	else if(tmp==2)
		for(int i=n/2+1; i<n; i++) cout<<str[i];
	else cout << "NOT UNIQUE";
	return 0;
}

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