public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  String input = sc . nextLine ( ) ;
  String [ ] inputs = input . split ( " " ) ;
  int count = Integer . valueOf ( inputs [ 0 ] ) ;
  int score = Integer . valueOf ( inputs [ 1 ] ) ;
  int [ ] a = new int [ count ] ;
  int [ ] b = new int [ count ] ;
  for ( int i = 0 ;
  i < count ;
  i ++ ) {
    String data = sc . nextLine ( ) ;
    String [ ] datas = data . split ( " " ) ;
    a [ i ] = Integer . valueOf ( datas [ 0 ] ) ;
    b [ i ] = Integer . valueOf ( datas [ 1 ] ) ;
  }
  int maxA = Integer . MIN_VALUE ;
  for ( int i = 0 ;
  i < count ;
  i ++ ) {
    if ( a [ i ] > maxA ) {
      maxA = a [ i ] ;
    }
    else if ( a [ i ] == maxA ) {
    }
  }
  int moves = 0 ;
  Arrays . sort ( b ) ;
  int [ ] j = new int [ count ] ;
  for ( int i = 0 ;
  i < count ;
  i ++ ) {
    j [ count - i - 1 ] = b [ i ] ;
  }
  b = j ;
  for ( int i = 0 ;
  i < count ;
  i ++ ) {
    if ( b [ i ] >= maxA ) {
      moves = moves + 1 ;
      score = score - b [ i ] ;
      if ( score <= 0 ) {
        break ;
      }
    }
  }
  if ( score > 0 ) {
    int extraMoves = score / maxA ;
    if ( score - ( extraMoves * maxA ) > 0 ) moves = moves + extraMoves + 1 ;
    else moves = moves + extraMoves ;
  }
  System . out . println ( moves ) ;
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; String input = sc . nextLine ( ) ; String [ ] inputs = input . split ( " ▁ " ) ; int count = Integer . valueOf ( inputs [ 0 ] ) ; int score = Integer . valueOf ( inputs [ 1 ] ) ; int [ ] a = new int [ count ] ; int [ ] b = new int [ count ] ; for ( int i = 0 ; i < count ; i ++ ) { String data = sc . nextLine ( ) ; String [ ] datas = data . split ( " ▁ " ) ; a [ i ] = Integer . valueOf ( datas [ 0 ] ) ; b [ i ] = Integer . valueOf ( datas [ 1 ] ) ; } int maxA = Integer . MIN_VALUE ; for ( int i = 0 ; i < count ; i ++ ) { if ( a [ i ] > maxA ) { maxA = a [ i ] ; } else if ( a [ i ] == maxA ) { } } int moves = 0 ; Arrays . sort ( b ) ; int [ ] j = new int [ count ] ; for ( int i = 0 ; i < count ; i ++ ) { j [ count - i - 1 ] = b [ i ] ; } b = j ; for ( int i = 0 ; i < count ; i ++ ) { if ( b [ i ] >= maxA ) { moves = moves + 1 ; score = score - b [ i ] ; if ( score <= 0 ) { break ; } } } if ( score > 0 ) { int extraMoves = score / maxA ; if ( score - ( extraMoves * maxA ) > 0 ) moves = moves + extraMoves + 1 ; else moves = moves + extraMoves ; } System . out . println ( moves ) ; }
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