import java.util.Scanner;

class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);			//文字の入力
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int ans = 0;
		
		int[] B = new int[M];
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0;i < N;i++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		}
		System.out.print(ans);
		
		
	}
	
	
}
 import java.util.Scanner; Scanner java.util class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);			//文字の入力
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int ans = 0;
		
		int[] B = new int[M];
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0;i < N;i++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		}
		System.out.print(ans);
		
		
	}
	
	
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);			//文字の入力
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int ans = 0;
		
		int[] B = new int[M];
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0;i < N;i++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		}
		System.out.print(ans);
		
		
	} main {
		Scanner sc = new Scanner(System.in);			//文字の入力
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int ans = 0;
		
		int[] B = new int[M];
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0;i < N;i++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		}
		System.out.print(ans);
		
		
	} 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 ans = 0; ans 0 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++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		} {
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		} int sum = 0; sum 0 for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				sum += sc.nextInt() * B[j];
			} {
				sum += sc.nextInt() * B[j];
			} sum += sc.nextInt() * B[j] sum sc.nextInt() * B[j] sc.nextInt() sc.nextInt sc B[j] B j sum += C sum C if(sum > 0){
				ans++;
			} sum > 0 sum 0 {
				ans++;
			} ans++ ans System.out.print(ans) System.out.print System.out System System.out ans String[] args args
import java.util.Scanner;

class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);			//文字の入力
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int ans = 0;
		
		int[] B = new int[M];
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		for(int i = 0;i < N;i++){
			int sum = 0;
			for(int j = 0;j < M;j++){
				sum += sc.nextInt() * B[j];
			}
			sum += C;
			if(sum > 0){
				ans++;
			}
		}
		System.out.print(ans);
		
		
	}
	
	
}

