Given an undirected graph having A nodes labelled from 1 to A with M edges given in a form of matrix B of size
M x 2 where (B[i], B[i]) represents two nodes B[i] and B[i] connected by an edge.
Find whether the graph contains a cycle or not, return 1 if cycle is present else return 0.
1 <= A, M <= 3105
1 <= B[i], B[i] <= A
The first argument given is an integer A representing the number of nodes in the graph.
The second argument given is an matrix B of size
M x 2 which represents the M edges such that there is a edge between node B[i] and node B[i].
Return 1 if cycle is present else return 0.
A = 5 B = [ [1. 2] [1, 3] [2, 3] [1, 4] [4, 5] ]
A = 3 B = [ [1. 2] [1, 3] ]
There is a cycle in the graph i.e 1 -> 2 -> 3 -> 1 so we will return 1
No cycle present in the graph so we will return 0.
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