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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	}
} 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	}
} 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	} 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	} 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 count =0; count 0 for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		} {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		} int temp =0; temp 0 for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				int t = sc.nextInt();
				temp +=t*B[j];
			} {
				int t = sc.nextInt();
				temp +=t*B[j];
			} int t = sc.nextInt(); t sc.nextInt() sc.nextInt sc temp +=t*B[j] temp t*B[j] t B[j] B j if (temp+C>0) {
				count++;
			} temp+C>0 temp+C temp C 0 {
				count++;
			} count++ count System.out.println(count) System.out.println System.out System System.out count 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	}
} 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	}
} 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 count =0;
		for (int i=0;i<N;i++) {
			int temp =0;
			for (int j=0;j<M;j++) {
				int t = sc.nextInt();
				temp +=t*B[j];
			}
			if (temp+C>0) {
				count++;
			}
		}
		System.out.println(count);
	}
}
