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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	}
} 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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	}
} 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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	} main {
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
	
		int[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(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[] bList = new int[m]; bList new int[m] m for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		} int i=0; int i=0; i 0 i<m i m i++ i++ i {
			bList[i] = sc.nextInt();
		} {
			bList[i] = sc.nextInt();
		} bList[i] = sc.nextInt() bList[i] bList i sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		} int j=0; int j=0; j 0 j<n j n j++ j++ j {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		} {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		} int count = 0; count 0 for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			} int k=0; int k=0; k 0 k<m k m k++ k++ k {
				count += sc.nextInt() * bList[k];
			} {
				count += sc.nextInt() * bList[k];
			} count += sc.nextInt() * bList[k] count sc.nextInt() * bList[k] sc.nextInt() sc.nextInt sc bList[k] bList k if (count+c > 0) {
				ans++;
			} count+c > 0 count+c count c 0 {
				ans++;
			} ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args 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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	}
} 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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	}
} 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[] bList = new int[m];
		for (int i=0; i<m; i++) {
			bList[i] = sc.nextInt();
		}
		
		int ans = 0;
		for (int j=0; j<n; j++) {
			int count = 0;
			for (int k=0; k<m; k++) {
				count += sc.nextInt() * bList[k];
			}
			if (count+c > 0) {
				ans++;
			}
		}
		
		System.out.println(ans);
	}
}
