[JAVA] SWEA D3 / 8931. 제로

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코드

백준에서 푼 적이 있는 것 같다.

import java.io.*;
import java.util.*;

class Solution {

    static Stack<Integer> stack = new Stack<>();

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int T = Integer.parseInt(br.readLine());

        for (int t = 1; t <= T; t++) {
            int k = Integer.parseInt(br.readLine());

            for (int i = 0; i < k; i++) {
                int num = Integer.parseInt(br.readLine());
                if (num == 0) {
                    stack.pop();
                } else {
                    stack.push(num);
                }
            }

            int sum = 0;
            while (!stack.isEmpty()) {
                sum += stack.pop();
            }

            System.out.println("#" + t + " " + sum);
        }
    }
}