

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	}

} Main public static void main(String[] args) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	} main {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	} int total = 0; total 0 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 = 0; A 0 int Bs[] = new int[M]; Bs new int[M] M int count = 0; count 0 for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < M i M i++ i++ i {
			Bs[i] = sc.nextInt();
		} {
			Bs[i] = sc.nextInt();
		} Bs[i] = sc.nextInt() Bs[i] Bs i sc.nextInt() sc.nextInt sc for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		} {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		} for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A = sc.nextInt();
				total += A * Bs[j];

			} {
				A = sc.nextInt();
				total += A * Bs[j];

			} A = sc.nextInt() A sc.nextInt() sc.nextInt sc total += A * Bs[j] total A * Bs[j] A Bs[j] Bs j total += C total C if (total > 0) {
				count++;
			} total > 0 total 0 {
				count++;
			} count++ count total = 0 total 0 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) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	}

} public class Main {

	public static void main(String[] args) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	}

} Main


import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
	
		int total = 0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int A = 0;
		int Bs[] = new int[M];
		int count = 0;
		for (int i = 0; i < M; i++) {
			Bs[i] = sc.nextInt();
		}

		for (int i = 0; i < N; i++) {
			for (int j = 0; j < M; j++) {
				A = sc.nextInt();
				total += A * Bs[j];

			}
			total += C;
			if (total > 0) {
				count++;
			}
			total = 0;
		}
		
		System.out.println(count);

	}

}
