
import java.io.*;
import java.util.*;

class Main{
    public static void main(String[] args){
        solve();
    }

    public static void solve(){
        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 ans = 0;
        for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        }

        System.out.println(ans);
    }
} import java.io.*; io.* java import java.util.*; util.* java class Main{
    public static void main(String[] args){
        solve();
    }

    public static void solve(){
        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 ans = 0;
        for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        }

        System.out.println(ans);
    }
} Main public static void main(String[] args){
        solve();
    } main {
        solve();
    } solve() solve String[] args args public static void solve(){
        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 ans = 0;
        for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        }

        System.out.println(ans);
    } solve {
        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 ans = 0;
        for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>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 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 ans = 0; ans 0 for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        } {
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        } int counter = 0; counter 0 for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	} int j=0; int j=0; j 0 j<m j m j++ j++ j {
        		counter += a[i][j]*b[j];
        	} {
        		counter += a[i][j]*b[j];
        	} counter += a[i][j]*b[j] counter a[i][j]*b[j] a[i][j] a[i] a i j b[j] b j counter += c counter c if(counter>0){
        		ans++;
        	} counter>0 counter 0 {
        		ans++;
        	} ans++ ans System.out.println(ans) System.out.println System.out System System.out ans

import java.io.*;
import java.util.*;

class Main{
    public static void main(String[] args){
        solve();
    }

    public static void solve(){
        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 ans = 0;
        for(int i=0;i<n;i++){
        	int counter = 0;
        	for(int j=0;j<m;j++){
        		counter += a[i][j]*b[j];
        	}
        	counter += c;

        	if(counter>0){
        		ans++;
        	}
        }

        System.out.println(ans);
    }
}