public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int m = sc . nextInt ( ) ;
  int [ ] [ ] arr = new int [ n ] [ m ] ;
  int [ ] store = new int [ m ] ;
  int count = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    String s = sc . next ( ) ;
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      arr [ i ] [ j ] = s . charAt ( j ) - '0' ;
      if ( s . charAt ( j ) - '0' > store [ j ] ) {
        store [ j ] = s . charAt ( j ) - '0' ;
      }
    }
  }
  sc . close ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < m ;
    j ++ ) {
      if ( arr [ i ] [ j ] == store [ j ] ) {
        count ++ ;
        break ;
      }
    }
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int m = sc . nextInt ( ) ; int [ ] [ ] arr = new int [ n ] [ m ] ; int [ ] store = new int [ m ] ; int count = 0 ; for ( int i = 0 ; i < n ; i ++ ) { String s = sc . next ( ) ; for ( int j = 0 ; j < m ; j ++ ) { arr [ i ] [ j ] = s . charAt ( j ) - '0' ; if ( s . charAt ( j ) - '0' > store [ j ] ) { store [ j ] = s . charAt ( j ) - '0' ; } } } sc . close ( ) ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { if ( arr [ i ] [ j ] == store [ j ] ) { count ++ ; break ; } } } System . out . println ( count ) ; }
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