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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		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 = 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		System.out.println(ans);
 	}
} 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		System.out.println(ans);
 	} 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		System.out.println(ans);
 	} 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 ans = 0; ans 0 for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		} {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		} int sum = 0; sum 0 int A[] = new int[M]; A new int[M] M for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			} {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			} A[j] = sc.nextInt() A[j] A j sc.nextInt() sc.nextInt sc sum += A[j]*B[j] sum A[j]*B[j] A[j] A j B[j] B j if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				} j == M-1 j M-1 M 1 {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				} sum += C sum C if (sum > 0) {
						ans++;
					} sum > 0 sum 0 {
						ans++;
					} ans++ ans 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 = 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		System.out.println(ans);
 	}
} 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		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 = 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 ans = 0;

		for (int i = 0; i < N; i++) {

			int sum = 0;
			int A[] = new int[M];

			for (int j = 0; j < M; j++) {
				A[j] = sc.nextInt();

				sum += A[j]*B[j];
				if (j == M-1) {
					sum += C;
					if (sum > 0) {
						ans++;
					}
				}
			}
		}
		System.out.println(ans);
 	}
}
