Getting wrong answer for Critical links (uva) ?

I am trying to solve [this][1] problem on UVA. My


[2] is continously showing wrong answer any one help me ?


  [1]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=737
  [2]: https://ideone.com/Fpn6pd
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