[BaekJoon] - 10773 제로

 

10773번: 제로

if __name__ == "__main__":
    count = int(input(""))
    stack = list()
    
    while count > 0:
        val = int(input(""))
        if val == 0:
            stack.pop()
        else:
            stack.append(val)
        count -= 1
    
    result = 0
    for i in stack:
        result +=i
    print(result)