fork(1) download
  1. s=' '*6+input()
  2. exec"s=s[1:]+('1'+s)[sum(s[i]<'1'for i in[-6,-1,1,6])>2or'/'>s];"*980
  3. print s[6:]
Success #stdin #stdout 0.1s 9352KB
stdin
"11001\n00000\n01001\n00000\n10001"
stdout
11001
11001
11001
11001
11001