public static long pop_xor(long[] arr1, long[] arr2, int wordOffset, int numWords) {long popCount = 0;for (int i = wordOffset, end = wordOffset + numWords; i < end; ++i) {popCount += Long.bitCount(arr1[i] ^ arr2[i]);}return popCount;}

public static long pop_xor ( long [ ] arr1 , long [ ] arr2 , int wordOffset , int numWords ) { long popCount = 0 ; for ( int i = wordOffset , end = wordOffset + numWords ; i < end ; ++ i ) { popCount += Long . bitCount ( arr1 [ i ] ^ arr2 [ i ] ) ; } return popCount ; }
public static long Pop_Xor(long[] arr1, long[] arr2, int wordOffset, int numWords){long popCount = 0;for (int i = wordOffset, end = wordOffset + numWords; i < end; ++i){popCount += (arr1[i] ^ arr2[i]).PopCount();}return popCount;}
