static int maxXORInRange ( int L , int R ) {
  int LXR = L ^ R ;
  int msbPos = 0 ;
  while ( LXR > 0 ) {
    msbPos ++ ;
    LXR >>= 1 ;
  }
  int maxXOR = 0 ;
  int two = 1 ;
  while ( msbPos -- > 0 ) {
    maxXOR += two ;
    two <<= 1 ;
  }
  return maxXOR ;
}

static int maxXORInRange ( int L , int R ) { int LXR = L ^ R ; int msbPos = 0 ; while ( LXR > 0 ) { msbPos ++ ; LXR >>= 1 ; } int maxXOR = 0 ; int two = 1 ; while ( msbPos -- > 0 ) { maxXOR += two ; two <<= 1 ; } return maxXOR ; }
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