题解 | 点击消除
点击消除
https://www.nowcoder.com/practice/8d3643ec29654cf8908b5cf3a0479fd5
def rm(s:str) ->str:
stack = []
for char in s:
if stack and stack[-1] == char:
stack.pop()
else:
stack.append(char)
return ''.join(stack) if stack else '0'
ss = input()
print(rm(ss))
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