static int countMaxLength ( int N ) {
  int res ;
  int pre [ ] = new int [ MAXN ] ;
  int p = 1 ;
  pre [ 0 ] = 0 ;
  for ( int i = 1 ;
  i < MAXN ;
  i ++ ) {
    p *= 2 ;
    pre [ i ] = pre [ i - 1 ] + i * p ;
  }
  int ind = 0 ;
  for ( int i = 1 ;
  i < MAXN ;
  i ++ ) {
    if ( pre [ i ] >= N ) {
      ind = i ;
      break ;
    }
  }
  int x = N - pre [ ind - 1 ] ;
  int y = 2 * ind - 1 ;
  if ( x >= y ) res = Math . min ( x , y ) ;
  else res = Math . max ( x , 2 * ( ind - 2 ) + 1 ) ;
  return res ;
}

static int countMaxLength ( int N ) { int res ; int pre [ ] = new int [ MAXN ] ; int p = 1 ; pre [ 0 ] = 0 ; for ( int i = 1 ; i < MAXN ; i ++ ) { p *= 2 ; pre [ i ] = pre [ i - 1 ] + i * p ; } int ind = 0 ; for ( int i = 1 ; i < MAXN ; i ++ ) { if ( pre [ i ] >= N ) { ind = i ; break ; } } int x = N - pre [ ind - 1 ] ; int y = 2 * ind - 1 ; if ( x >= y ) res = Math . min ( x , y ) ; else res = Math . max ( x , 2 * ( ind - 2 ) + 1 ) ; return res ; }
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