static int findSubarray ( int array [ ] , int n ) {
  HashMap < Integer , Integer > mp = new HashMap < Integer , Integer > ( ) ;
  mp . put ( 0 , 1 ) ;
  int answer = 0 ;
  int preXor = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int value = 1 ;
    preXor ^= array [ i ] ;
    for ( int j = 1 ;
    j <= MAX ;
    j ++ ) {
      int Y = value ^ preXor ;
      if ( mp . containsKey ( Y ) ) {
        answer += mp . get ( Y ) ;
      }
      value *= 2 ;
    }
    if ( mp . containsKey ( preXor ) ) {
      mp . put ( preXor , mp . get ( preXor ) + 1 ) ;
    }
    else {
      mp . put ( preXor , 1 ) ;
    }
  }
  return answer ;
}

static int findSubarray ( int array [ ] , int n ) { HashMap < Integer , Integer > mp = new HashMap < Integer , Integer > ( ) ; mp . put ( 0 , 1 ) ; int answer = 0 ; int preXor = 0 ; for ( int i = 0 ; i < n ; i ++ ) { int value = 1 ; preXor ^= array [ i ] ; for ( int j = 1 ; j <= MAX ; j ++ ) { int Y = value ^ preXor ; if ( mp . containsKey ( Y ) ) { answer += mp . get ( Y ) ; } value *= 2 ; } if ( mp . containsKey ( preXor ) ) { mp . put ( preXor , mp . get ( preXor ) + 1 ) ; } else { mp . put ( preXor , 1 ) ; } } return answer ; }
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