We are given a graph of n nodes and m edges. Also given some value for each node.

For each node (i = 1 to N) , we have to remove all the edges associated with node i , and we have to return number of pairs of nodes that have same value but are on different component!

PS — I know it can be solved by block cut tree.

Can u please give me any other method or the name of algo which can be used to solve this problem!