Submission #847416

#	Time	Username	Problem	Language	Result	Execution time	Memory
847416		MinaRagy06	The Xana coup (BOI21_xanadu)	C++17	0 / 100	15 ms	600 KiB

xanadu

#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;

int main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n;
    for (int i = 1; i < n; i++) {
        int a, b;
        cin >> a >> b;
    }
    int a[n];
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        if (a[i] && i != 2 && n - 1 - i != 2) {
            cout << "impossible";
            return 0;
        }
        cnt += a[i];
    }
    cout << cnt * 2 << '\n';
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 40
• Subtask 5: 0 / 30