import java.util.Scanner;


public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	} main {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int m = Integer.parseInt(sc.next()); m Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int c = Integer.parseInt(sc.next()); c Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int[] b = new int[m]; b new int[m] m for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		} int i=0; int i=0; i 0 i<m i m i++ i++ i {
			b[i]=Integer.parseInt(sc.next());
		} {
			b[i]=Integer.parseInt(sc.next());
		} b[i]=Integer.parseInt(sc.next()) b[i] b i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int count=0; count 0 for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		} {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		} int total=c; total c for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			} int j=0; int j=0; j 0 j<m j m j++ j++ j {
				total+=b[j]*Integer.parseInt(sc.next());
			} {
				total+=b[j]*Integer.parseInt(sc.next());
			} total+=b[j]*Integer.parseInt(sc.next()) total b[j]*Integer.parseInt(sc.next()) b[j] b j Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc if(total>0) {
				count++;
			} total>0 total 0 {
				count++;
			} count++ count 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 = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	}
} Main
import java.util.Scanner;


public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int m = Integer.parseInt(sc.next());
		int c = Integer.parseInt(sc.next());
		int[] b = new int[m];
		for(int i=0;i<m;i++) {
			b[i]=Integer.parseInt(sc.next());
		}
		int count=0;
		for(int i=0;i<n;i++) {
			int total=c;
			for(int j=0;j<m;j++) {
				total+=b[j]*Integer.parseInt(sc.next());
			}
			if(total>0) {
				count++;
			}

		}
		System.out.println(count);

	}
}
