Submission #7060903

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Source Code Expand

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

int N;
int a[110];

int main() {
    cin >> N;
    for (int i = 0; i < N; i++) cin >> a[i];

    int total = 0;
    for (int i = 0; i < N; i++) total += a[i];

    if (total % N != 0) {
        cout << -1 << endl;
    }
    else {
        int ans = 0;
        int tmp_sum = 0;
        int people = total / N;
        for (int i = 0; i < N; i++) {
            tmp_sum += a[i];
            if ((i+1)*people != (N - i - 1)*people) {
                ans++;
            }
        }

        cout << ans << endl;
    }


    return 0;
}

Submission Info

Judge Result