Driver Code
N = 7 ; NEW_LINE addEdge ( 0 , 1 ) ; NEW_LINE addEdge ( 0 , 2 ) ; NEW_LINE addEdge ( 1 , 3 ) ; NEW_LINE addEdge ( 3 , 4 ) ; NEW_LINE addEdge ( 3 , 5 ) ; NEW_LINE addEdge ( 2 , 6 ) ; NEW_LINE