static int andSum ( int arr [ ] , int n ) {
  int ans = 0 ;
  for ( int i = 0 ;
  i < BITS ;
  i ++ ) {
    int countSetBits = 0 ;
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      if ( ( arr [ j ] & ( 1 << i ) ) != 0 ) countSetBits ++ ;
    }
    int subset = ( 1 << countSetBits ) - 1 ;
    subset = ( subset * ( 1 << i ) ) ;
    ans += subset ;
  }
  return ans ;
}

static int andSum ( int arr [ ] , int n ) { int ans = 0 ; for ( int i = 0 ; i < BITS ; i ++ ) { int countSetBits = 0 ; for ( int j = 0 ; j < n ; j ++ ) { if ( ( arr [ j ] & ( 1 << i ) ) != 0 ) countSetBits ++ ; } int subset = ( 1 << countSetBits ) - 1 ; subset = ( subset * ( 1 << i ) ) ; ans += subset ; } return ans ; }
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