import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		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, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N N M M C; C N = sc.nextInt() N sc.nextInt() sc.nextInt sc M = sc.nextInt() M sc.nextInt() sc.nextInt sc C = sc.nextInt() C sc.nextInt() sc.nextInt sc int B[] = new int[M]; B new int[M] M int A[][] = new int[N][M]; A new int[N][M] N 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 ans = 0; ans 0 for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 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++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		} {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		} int sum = 0; sum 0 for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			} {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			} A[i][j] = sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc sum += B[j] * A[i][j] sum B[j] * A[i][j] B[j] B j A[i][j] A[i] A i j if (sum + C > 0) {
				ans++;
			} sum + C > 0 sum + C sum C 0 {
				ans++;
			} ans++ ans sc.close() sc.close sc 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, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

		int ans = 0;
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				sum += B[j] * A[i][j];
			}
			if (sum + C > 0) {
				ans++;
			}
		}
		sc.close();
		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, M, C;
		N = sc.nextInt();
		M = sc.nextInt();
		C = sc.nextInt();
		int B[] = new int[M];
		int A[][] = new int[N][M];

		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}

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