public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  String input = sc . nextLine ( ) ;
  int tmp [ ] = convertStringToArrayInt ( input ) ;
  int N = tmp [ 0 ] ;
  int C = tmp [ 2 ] ;
  int counter = 0 ;
  input = sc . nextLine ( ) ;
  int b [ ] = convertStringToArrayInt ( input ) ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    input = sc . nextLine ( ) ;
    int arr [ ] = convertStringToArrayInt ( input ) ;
    int source = 0 ;
    for ( int j = 0 ;
    j < arr . length ;
    j ++ ) {
      source = source + ( b [ j ] * arr [ j ] ) ;
    }
    if ( source + C > 0 ) {
      counter ++ ;
    }
  }
  System . out . println ( counter ) ;
  sc . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; String input = sc . nextLine ( ) ; int tmp [ ] = convertStringToArrayInt ( input ) ; int N = tmp [ 0 ] ; int C = tmp [ 2 ] ; int counter = 0 ; input = sc . nextLine ( ) ; int b [ ] = convertStringToArrayInt ( input ) ; for ( int i = 0 ; i < N ; i ++ ) { input = sc . nextLine ( ) ; int arr [ ] = convertStringToArrayInt ( input ) ; int source = 0 ; for ( int j = 0 ; j < arr . length ; j ++ ) { source = source + ( b [ j ] * arr [ j ] ) ; } if ( source + C > 0 ) { counter ++ ; } } System . out . println ( counter ) ; sc . close ( ) ; }
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