Driver Code
public static void main ( String [ ] args ) { Node arr [ ] = { new Node ( 5 , 7 , 2 ) , new Node ( 4 , 6 , 1 ) , new Node ( 1 , 5 , 2 ) , new Node ( 6 , 5 , 1 ) } ; int N = arr . length ; isPossible ( arr , N ) ; } }