text: Driver Code
code: if __name__ == ' _ _ main _ _ ' : NEW_LINE INDENT arr = [ [ 5 , 7 , 2 ] , [ 4 , 6 , 1 ] , [ 1 , 5 , 2 ] , [ 6 , 5 , 1 ] ] NEW_LINE N = len ( arr ) NEW_LINE isPossible ( arr , N ) NEW_LINE DEDENT