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

🥚문제

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🥚입력/출력

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🍳코드

from sys import stdin
input = stdin.readline

data_list = []
for _ in range(int(input())):
    num = int(input())
    if num == 0:
        data_list.pop()
    else:
        data_list.append(num)

# 출력
print(sum(data_list))

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🧂아이디어