public static void main ( String [ ] args ) {
  FastReader fr = new FastReader ( ) ;
  int n = fr . nextInt ( ) ;
  int gmax = Integer . MIN_VALUE ;
  String [ ] s = new String [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    s [ i ] = fr . next ( ) ;
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int locamax = 0 ;
    for ( int j = i ;
    j < n ;
    j ++ ) {
      if ( s [ i ] . equals ( s [ j ] ) ) locamax ++ ;
    }
    if ( locamax > gmax ) gmax = locamax ;
  }
  System . out . println ( gmax ) ;
}

public static void main ( String [ ] args ) { FastReader fr = new FastReader ( ) ; int n = fr . nextInt ( ) ; int gmax = Integer . MIN_VALUE ; String [ ] s = new String [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { s [ i ] = fr . next ( ) ; } for ( int i = 0 ; i < n ; i ++ ) { int locamax = 0 ; for ( int j = i ; j < n ; j ++ ) { if ( s [ i ] . equals ( s [ j ] ) ) locamax ++ ; } if ( locamax > gmax ) gmax = locamax ; } System . out . println ( gmax ) ; }
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