import java.io.File;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    }
} import java.io.File; File java.io import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    }
} Main public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    } main {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 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[][] A = new int[N][M]; A new int[N][M] N M 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 sc.close() sc.close sc int ans = 0; ans 0 for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	} {
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	} int num = 0; num 0 for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
    			num += A[i][j] * B[j];
    		} {
    			num += A[i][j] * B[j];
    		} num += A[i][j] * B[j] num A[i][j] * B[j] A[i][j] A[i] A i j B[j] B j num += C num C if(num > 0) ans++; num > 0 num 0 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) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    }
} public class Main {

    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    }
} Main
import java.io.File;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) throws Exception {

//    	File file = new File("test.txt");
//    	Scanner sc = new Scanner(file);
    	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[][] A = new int[N][M];
    	for(int i = 0; i < N; i++){
    		for(int j = 0; j < M; j++){
    			A[i][j] = sc.nextInt();
    		}
    	}
    	sc.close();
    	int ans = 0;
    	for(int i = 0; i < N; i++){
    		int num = 0;
    		for(int j = 0; j < M; j++){
    			num += A[i][j] * B[j];
    		}
    		num += C;
    		if(num > 0) ans++;
    	}
    	System.out.println(ans);
    }
}