[백준,c++] 10773번 - 제로

10773번: 제로

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

int main() {
    int T, ans = 0;
    stack<int> st;
    cin >> T;
    while (T--) {
        int number;
        cin >> number;
        if (number == 0) {
            if (!st.empty()) st.pop();
        }
        else st.push(number);
        }
    while (!st.empty()) {
        ans += st.top();
        st.pop();
    }
    cout << ans;
}