[JAVA]백준_10773_제로

문제링크

https://www.acmicpc.net/problem/10773

10773번: 제로

 

 

 

package BOJ;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Stack;

public class Main_10773 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        Stack<Integer> stack = new Stack<>();
        int result = 0;

        int K = Integer.parseInt(br.readLine());

        for(int k=0;k<K;k++){
            int number = Integer.parseInt(br.readLine());

            if(number!=0) stack.push(number);
            else stack.pop();
        }

        while (!stack.isEmpty()){
            result += stack.pop();
        }

        System.out.println(result);
    }
}