题解 | 卡牌游戏

#include <iostream>
#include<vector>
using namespace std;

int main() {
    int n, num;
    cin >> n;
    vector<long long>a(n);
    for (int i = 0; i < n; i++) {
        cin >> num;
        if (i == 0)
            a[i] = num;
        else
            a[i] = a[i - 1] + num;
    }
    long long sum = 0;
    for (int i = 1; i < n; i++) {
        if (a[i] > 0)
            sum += a[i];
    }
    cout << sum;
}
// 64 位输出请用 printf("%lld")