import 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 count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	}
} import java.util.*; util.* java 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 count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	}
} 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 count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		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 count =0; count 0 int sum =0; sum 0 int [] hairetuB = new int[M]; hairetuB new int[M] M for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		} int i=0; int i=0; i 0 i<M i M i++ i++ i {
			hairetuB[i] = sc.nextInt();
		} {
			hairetuB[i] = sc.nextInt();
		} hairetuB[i] = sc.nextInt() hairetuB[i] hairetuB i sc.nextInt() sc.nextInt sc for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		} {
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		} for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			} {
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			} int A =sc.nextInt(); A sc.nextInt() sc.nextInt sc sum = sum +hairetuB[j]*A sum sum +hairetuB[j]*A sum hairetuB[j]*A hairetuB[j] hairetuB j A if(sum+C>0){
				count++;
			} sum+C>0 sum+C sum C 0 {
				count++;
			} count++ count sum=0 sum 0 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) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	}
} 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 count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	}
} Main
import 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 count =0;
		int sum =0;
		int [] hairetuB = new int[M];
		for(int i=0;i<M;i++){
			hairetuB[i] = sc.nextInt();
		}
		for(int i=0;i<N;i++){
			for(int j=0;j<M;j++){
				int A =sc.nextInt();
				sum = sum +hairetuB[j]*A;
			}
			if(sum+C>0){
				count++;
			}
			sum=0;
		}
		System.out.println(count);
	}
}
