import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
    
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	}
} import java.util.*; util.* java import static java.lang.Math.*; import static java.lang.Math.*; import static java.lang.Math.*; import java.math.BigInteger; BigInteger java.math public class Main {
    
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	} main {
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	} 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 cnt = 0; cnt 0 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++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		} {
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		} int sum = 0; sum 0 for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    } int j = 0; int j = 0; j 0 j < m j m j++ j++ j {
		        int a = sc.nextInt();
		        sum += a*b[j];
		    } {
		        int a = sc.nextInt();
		        sum += a*b[j];
		    } int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc sum += a*b[j] sum a*b[j] a b[j] b j if(sum + c > 0) cnt++; sum + c > 0 sum + c sum c 0 cnt++ cnt int result = cnt; result cnt System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
    
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	}
} public class Main {
    
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	}
} Main
import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
    
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int m = sc.nextInt();
		int c = sc.nextInt();
		int[] b = new int[m];
		int cnt = 0;
		for(int i = 0; i < m; i++){
		    b[i] = sc.nextInt();
		}
		for(int i = 0; i < n; i++){
		    int sum = 0;
		    for(int j = 0; j < m; j++){
		        int a = sc.nextInt();
		        sum += a*b[j];
		    }
		    if(sum + c > 0) cnt++;
		}
		
		// 計算
		int result = cnt;
		
		// 出力
		System.out.println(result);
        
	}
}
