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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
} 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
} 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	} 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	} 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 cnt = 0; cnt 0 int[][] a = new int[N][M]; a new int[N][M] N M for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		} 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 += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		} {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		} int sum = 0; sum 0 for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			} {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			} a[i][j] = sc.nextInt() a[i][j] a[i] a i j sc.nextInt() sc.nextInt sc sum += a[i][j] * b[j] sum a[i][j] * b[j] a[i][j] a[i] a i j b[j] b j if (sum + C > 0) {
				cnt++;
			} sum + C > 0 sum + C sum C 0 {
				cnt++;
			} cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
} 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
} 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 cnt = 0;
		int[][] a = new int[N][M];
		for (int i = 0; i < N; i++) {
			int sum = 0;
			for (int j = 0; j < M; j++) {
				a[i][j] = sc.nextInt();
				sum += a[i][j] * b[j];
			}
			if (sum + C > 0) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
}
