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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	}
} 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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	}
} 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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int 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();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	} 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 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 for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		} {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		} for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A[i][j] = sc.nextInt();
			} {
				A[i][j] = sc.nextInt();
			} A[i][j] = sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc int result = 0; result 0 int correct = 0; correct 0 for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		} {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		} for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				result += A[i][j]*B[j];
			} {
				result += A[i][j]*B[j];
			} result += A[i][j]*B[j] result A[i][j]*B[j] A[i][j] A[i] A i j B[j] B j if(result+C > 0)correct += 1; result+C > 0 result+C result C 0 correct += 1 correct 1 result = 0 result 0 System.out.println(correct) System.out.println System.out System System.out correct 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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	}
} 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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	}
} 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];
		int[][] A = new int[N][M];
		for (int i = 0; i < M; i++) {
			B[i] = sc.nextInt();
		}
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
			}
		}
		int result = 0;
		int correct = 0;
		for(int i = 0; i < N; i++) {
			for(int j = 0; j < M; j++) {
				result += A[i][j]*B[j];
			}
			if(result+C > 0)correct += 1;
			result = 0;
		}
		System.out.println(correct);
	}
}