Submission #398768

#	Time	Username	Problem	Language	Result	Execution time	Memory
398768		ALI_SQUARED	Three Friends (BOI14_friends)	C++14	0 / 100	74 ms	9388 KiB

friends

#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    cin >> n;

    string s, a = "", b = "", answer1 = "", answer2 = "";
    int c = 0;
    cin >> s;

    if (n % 2 == 0){cout << "Not Possible"; return 0;}

    for (int i = 0; i < n/2; i++){
        if (s[i] == s[n/2 + i + c]) {
            a += s[i], b += s[n/2 + i + c];
        }
        else{
            if (s[n/2 + i + 1] != s[i]){a = 'z', b = 'x'; break;}
            else a += s[i], b += s[n/2 + i + 1], c = 1;
        }
        //cout << "a: " << a << " b: " << b << "\n";
    }

    if (a == b) answer1 = a;

    //cout << "answer1: " << answer1 << "\n";

    a = "", b = "", c = 0;
    for (int i = 0; i < n/2; i++){
        if (s[i + c] == s[n/2 + i + 1]){
            a += s[i + c], b += s[n/2 + i + 1];
        }
        else{
            if (s[i + 1] != s[n/2 + i + 1]){a = 'z', b = 'x'; break;}
            else a += s[i + 1], b += s[n/2 + i + 1], c = 1;
        }
        //cout << "a: " << a << " b: " << b << "\n";
    }

    if (a == b) answer2 = b;

    //cout << "answer2: " << answer2 << "\n";

    if (answer1.size() && answer2.size() && answer1 != answer2) cout << "Not Unique";
    else if (!answer1.size() && !answer2.size()) cout << "Not Possible";
    else if (answer1.size()) cout << answer1;
    else cout << answer2;

    return 0;
}

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