stu241345
UID: 3633, 注册于 2024-8-20 21:20:36, 最后登录于 2025-10-23 8:36:53, 最后活动于 2025-10-7 14:12:08.
解决了 1 道题目，RP: 4 (No. 844)
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个人简介
s=input() st=['']*100 top = -1 flag = True
for i in s: if i == "(" or i == "[":
top += 1 st[top] = i elif st[top] + i =="()" or st[top] + i "[]": top = top-1 else: flag = False break if top-1 and flag: print("Yes") else: print("No") -
最近活动
This person is lazy and didn't join any contests or homework.