Submission #535134

#	Time	Username	Problem	Language	Result	Execution time	Memory
535134		__Variatto	Three Friends (BOI14_friends)	C++17	0 / 100	1086 ms	5280 KiB

friends

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define ll long long
const int MAX=2e3;
int n;
string s;
bool sa(int x){
    int l, p;
    if(x<n/2+1)
        l=1, p=n/2+2;
    else
        l=1, p=n/2+1;
    if(l==x) l++;
    if(p==x) p++;
    for(int i=1; i<=n/2; i++){
        if(s[l]!=s[p])
            return false;
        l++, p++;
        if(l==x) l++;
        if(p==x) p++;
    }
    return true;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin>>n>>s;
    if(n%2==0){
        cout<<"NO POSSIBLE\n";
        return 0;
    }
    s='%'+s;
    int ile=0, wyn;
    for(int i=1;i<=n; i++){
        if(sa(i))
            ile++, wyn=i;
    }
    if(!ile)
        cout<<"NO POSSIBLE\n";
    else if(ile>1)
        cout<<"NOT UNIQUE\n";
    else{
        int xd=0;
        for(int i=1; i<=n; i++){
            if(i!=wyn){
                cout<<s[i];
                xd++;
            }
            if(xd==n/2)
                break;
        }
        cout<<"\n";
    }
}

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