Given a set , find XOR of the XOR 's of all subsets. | Returns XOR of all XOR 's of given subset ; XOR is 1 only when n is 1 , else 0 ; Driver Code
< ? php function findXOR ( $ Set , $ n ) { if ( $ n == 1 ) return $ Set [ 0 ] ; else return 0 ; } $ Set = array ( 1 , 2 , 3 ) ; $ n = count ( $ Set ) ; echo " XOR ▁ of ▁ XOR ' s ▁ of ▁ all ▁ subsets ▁ is ▁ " , findXOR ( $ Set , $ n ) ; ? >