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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	}

} 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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	}

} 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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	} 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[] 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 int res = 0; res 0 for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		} {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		} long tRes = 0; tRes 0 for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			} int j=0; int j=0; j 0 j<m j m j++ j++ j {
				tRes += b[j]*sc.nextInt();
			} {
				tRes += b[j]*sc.nextInt();
			} tRes += b[j]*sc.nextInt() tRes b[j]*sc.nextInt() b[j] b j sc.nextInt() sc.nextInt sc if (tRes + c > 0) {
				res++;
			} tRes + c > 0 tRes + c tRes c 0 {
				res++;
			} res++ res System.out.println(res) System.out.println System.out System System.out res sc.close() sc.close sc 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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	}

} 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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	}

} 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[] b = new int[m];
		for (int i=0; i<m; i++) {
			b[i] = sc.nextInt();
		}
		int res = 0;
		for (int i=0; i<n; i++) {
			long tRes = 0;
			for (int j=0; j<m; j++) {
				tRes += b[j]*sc.nextInt();
			}
			if (tRes + c > 0) {
				res++;
			}
		}
		System.out.println(res);
		sc.close();
	}

}
