백준 4949 - 균형잡힌 세상 (파이썬)

Answer

while True:
    s = input()
    
    if s == '.':
        break
        
    stack = []
    temp = True
    
    for i in s:
        if i == '(' or i == '[':
            stack.append(i)
        elif i == ')':
            if not stack or stack[-1] == '[':
                temp = False
                break
            elif stack[-1] == '(':
                stack.pop()
        elif i == ']':
            if not stack or stack[-1] == '(':
                temp = False
                break
            elif stack[-1] == '[':
                stack.pop()
                
    if temp == True and not stack:
        print('yes')
    else:
        print('no')