import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	}
	
	
	public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	}
	

} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	}
	
	
	public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	}
	

} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int M = sc.nextInt(); M sc.nextInt() sc.nextInt sc int C = sc.nextInt(); C sc.nextInt() sc.nextInt sc int[][] A = new int[N][M]; A new int[N][M] N M int[] B = new int[M]; B new int[M] M for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < M i M i++ i++ i {
			B[i] = sc.nextInt();
		} {
			B[i] = sc.nextInt();
		} B[i] = sc.nextInt() B[i] B i sc.nextInt() sc.nextInt sc for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		} {
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		} for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A[i][j] = sc.nextInt();
			} {
				A[i][j] = sc.nextInt();
			} A[i][j] = sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc sc.close() sc.close sc int result = 0; result 0 for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		} {
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		} int r = multiply(A[i], B, C); r multiply(A[i], B, C) multiply A[i] A i B C if(r > 0) result++; r > 0 r 0 result++ result System.out.println(result) System.out.println System.out System System.out result String[] args args public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	} multiply {
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	} int result = 0; result 0 for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		} int i = 0; int i = 0; i 0 i < A.length i A.length A A.length i++ i++ i {
			result += (A[i] * B[i]);
		} {
			result += (A[i] * B[i]);
		} result += (A[i] * B[i]) result (A[i] * B[i]) A[i] A i B[i] B i return result + C; result + C result C int[] A A int[] B B int C C public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	}
	
	
	public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	}
	

} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	}
	
	
	public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	}
	

} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[][] A = new int[N][M];
		int[] B = new int[M];
		for(int i = 0; i < M; i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++){
			for(int j = 0; j < M; j++){
				A[i][j] = sc.nextInt();
			}
		}
		sc.close();
		int result = 0;
		for(int i = 0; i < N; i++){
			int r = multiply(A[i], B, C);
			if(r > 0) result++;
		}
		System.out.println(result);
	}
	
	
	public static int multiply(int[] A, int[] B, int C){
		int result = 0;
		for(int i = 0; i < A.length; i++){
			result += (A[i] * B[i]);
		}
		return result + C;
		
	}
	

}
