
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	}

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

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	} main {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + 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 num = 0; num 0 long sum = 0; sum 0 int count = 0; count 0 int[][] A = new int[N][M]; A new int[N][M] N M for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		} {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		} sum = 0 sum 0 for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			} {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			} num = sc.nextInt() num sc.nextInt() sc.nextInt sc A[i][j] = B[j] * num A[i][j] A[i] A i j B[j] * num B[j] B j num sum += A[i][j] sum A[i][j] A[i] A i j if(sum + C > 0) {
				count++;
			} sum + C > 0 sum + C sum 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) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	}

} Main

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		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 num = 0;
		long sum = 0;
		int count = 0;
		int[][] A = new int[N][M];
		for(int i = 0; i < N; i++) {
			sum = 0;
			for(int j = 0; j < M; j++) {
				num = sc.nextInt();
				A[i][j] = B[j] * num;
				sum += A[i][j];
			}
			if(sum + C > 0) {
				count++;
			}
		}

		System.out.println(count);

	}

}
