public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int codeNum = sc . nextInt ( ) ;
  int featNum = sc . nextInt ( ) ;
  int c = sc . nextInt ( ) ;
  int [ ] b = new int [ featNum ] ;
  int num = 0 ;
  int num2 = 0 ;
  int sum = 0 ;
  int count = 0 ;
  for ( int i = 0 ;
  i < featNum ;
  i ++ ) {
    b [ i ] = sc . nextInt ( ) ;
  }
  for ( int i = 0 ;
  i < codeNum ;
  i ++ ) {
    for ( int j = 0 ;
    j < featNum ;
    j ++ ) {
      num = sc . nextInt ( ) ;
      num2 = b [ j ] * num ;
      sum += num2 ;
    }
    if ( sum + c > 0 ) count ++ ;
    sum = 0 ;
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int codeNum = sc . nextInt ( ) ; int featNum = sc . nextInt ( ) ; int c = sc . nextInt ( ) ; int [ ] b = new int [ featNum ] ; int num = 0 ; int num2 = 0 ; int sum = 0 ; int count = 0 ; for ( int i = 0 ; i < featNum ; i ++ ) { b [ i ] = sc . nextInt ( ) ; } for ( int i = 0 ; i < codeNum ; i ++ ) { for ( int j = 0 ; j < featNum ; j ++ ) { num = sc . nextInt ( ) ; num2 = b [ j ] * num ; sum += num2 ; } if ( sum + c > 0 ) count ++ ; sum = 0 ; } System . out . println ( count ) ; }
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