there n server number 0 n 1 connect undirected servertoserver connection form network connectionsi ai bi represent connection server ai bi any server reach server directly indirectly networka critical connection connection remove server unable reach serverreturn critical connection network order Example 1input n 4 connection 01122013output 13explanation 31 acceptedExample 2Input n 2 connection 01output 01 Constraints2 n 105n 1 connectionslength 1050 ai bi n 1ai biThere repeat connection