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  1. import sys
  2. a=set()
  3. n=int(input())
  4. for i in range(n):
  5.     d=list(map(str,sys.stdin.readline().split(' ')))
  6.     if d[0]=='add':
  7.         a.add(d[1])
  8.     elif d[0]=='remove':
  9.         a.discard(d[1])
  10.     elif d[0]=='check':
  11.         if d[1] in a:
  12.             print(1)
  13.         else:
  14.             print(0)
  15.     elif d[0]=='toggle':
  16.         if d[1] in a:
  17.             a.discard(d[1])
  18.         else:
  19.             a.add(d[1])
  20.     elif d[0]=='all':
  21.         a=set()
  22.         for i in range(1,21):
  23.             i=str(i)
  24.             a.add(i)
  25.     else:
  26.         a=set()
Success #stdin #stdout 0.03s 9412KB
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stdin
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https://ideone.com/gKf6Sf
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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