Sum of XOR of sum of all pairs in an array | Java program to find XOR of pair sums . ; Driver code
class GFG { static int xorPairSum ( int ar [ ] , int n ) { int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) sum = sum ^ ar [ i ] ; return 2 * sum ; } public static void main ( String args [ ] ) { int arr [ ] = { 1 , 2 , 3 } ; int n = arr . length ; System . out . println ( xorPairSum ( arr , n ) ) ; } }