import java.util.Scanner;
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 sum = 0;
			int flag = 0;
			for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			}
			System.out.println(flag);
	}
} import java.util.Scanner; Scanner java.util 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 sum = 0;
			int flag = 0;
			for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			}
			System.out.println(flag);
	}
} 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 sum = 0;
			int flag = 0;
			for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			}
			System.out.println(flag);
	} 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 sum = 0;
			int flag = 0;
			for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			}
			System.out.println(flag);
	} 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 sum = 0; sum 0 int flag = 0; flag 0 for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			} {
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			} for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				} int j = 0; int j = 0; j 0 j < a[i].length j a[i].length a[i] a i a[i].length j++ j++ j {
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				} {
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				} sum = sum + (a[i][j] * b[j]) sum sum + (a[i][j] * b[j]) sum (a[i][j] * b[j]) a[i][j] a[i] a i j b[j] b j if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					} j == a[i].length-1 j a[i].length-1 a[i].length a[i] a i a[i].length 1 {
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					} if( sum + c > 0 ){
							flag++;
						} sum + c > 0 sum + c sum c 0 {
							flag++;
						} flag++ flag sum = 0 sum 0 System.out.println(flag) System.out.println System.out System System.out flag String[] args args
import java.util.Scanner;
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 sum = 0;
			int flag = 0;
			for(int i = 0; i < a.length; i++){
				for(int j = 0; j < a[i].length; j++){
					sum = sum + (a[i][j] * b[j]);
					if( j == a[i].length-1){
						if( sum + c > 0 ){
							flag++;
						}
						sum = 0;
					}
				}
				
			}
			System.out.println(flag);
	}
}