Envío 4047

Código

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

#define endl '\n'
#define ll long long
#define sz(x) int(x.size())
#define dbg(x) cout << #x << " = " << x << endl

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n; cin >> n;
    int val[n];
    int sum = 0;
    for (int &i : val) cin >> i, sum += i;
    int ans = -1;
    int act = 0;
    for (int i = 0; i < n - 1; ++i) {
        act += val[i];
        if (act > 0 && sum - act < 0) {
            ans = i + 1;
            break;
        }
    }
    if (ans == -1) cout << "Impossible" << endl;
    else cout << ans << endl;
    return 0;
}