IT Security Stack Exchange
IT Security Stack Exchange

柯鴻儀
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  • Taiwan
  • Member since June 28 2015
  • 7 profile views
  • Last seen Oct 01 '21 at 11:32

A clever cat problem:

https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=43