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[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	}
} 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[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	}
} 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];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();
		int[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	} 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 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 int num = 0; num 0 for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		} {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		} int sum=C; sum C for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				sum += B[j]*sc.nextInt();
			} {
				sum += B[j]*sc.nextInt();
			} sum += B[j]*sc.nextInt() sum B[j]*sc.nextInt() B[j] B j sc.nextInt() sc.nextInt sc if (sum>0) num++; sum>0 sum 0 num++ num System.out.println(num) System.out.println System.out System System.out num 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[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	}
} 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[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	}
} 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[] B = new int[M];
		for(int i=0;i<M;i++) {
			B[i] = sc.nextInt();
		}
		int num = 0;
		for(int i=0;i<N;i++) {
			int sum=C;
			for(int j=0;j<M;j++) {
				sum += B[j]*sc.nextInt();
			}
			if (sum>0) num++;
		}
		System.out.println(num);
	}
}