static int maxOR ( int L , int R ) {
  if ( L == R ) {
    return L ;
  }
  int ans = 0 ;
  for ( int i = MAX - 1 ;
  i >= 0 ;
  i -- ) {
    int p , lbit , rbit ;
    p = 1 << i ;
    lbit = ( L >> i ) & 1 ;
    rbit = ( R >> i ) & 1 ;
    if ( ( rbit == 1 ) && ( lbit == 0 ) ) {
      ans += ( p << 1 ) - 1 ;
      break ;
    }
    if ( rbit == 1 ) {
      ans += p ;
    }
  }
  return ans ;
}

static int maxOR ( int L , int R ) { if ( L == R ) { return L ; } int ans = 0 ; for ( int i = MAX - 1 ; i >= 0 ; i -- ) { int p , lbit , rbit ; p = 1 << i ; lbit = ( L >> i ) & 1 ; rbit = ( R >> i ) & 1 ; if ( ( rbit == 1 ) && ( lbit == 0 ) ) { ans += ( p << 1 ) - 1 ; break ; } if ( rbit == 1 ) { ans += p ; } } return ans ; }
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