# TADM2E 5.17

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Revision as of 05:48, 31 January 2016 by Rahul Biswas (Talk | contribs)

use dfs to find cycle of lenght 3.

we maintain an array parent[i].

while processing any backedge u-v we check whether gradparent of u is equal to v .if true we found a cycle of lenght 3.

i,e parent[parent[u]] == v,then found cycle of lenght 3