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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	}
} 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	}
} 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	} 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 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 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 A[][] = new int[N][M]; A new int[N][M] N M int ans = 0; ans 0 for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		} {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		} int temp = C; temp C for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			} int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			} {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			} A[i][j] = sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc temp = temp + A[i][j] * B[j] temp temp + A[i][j] * B[j] temp A[i][j] * B[j] A[i][j] A[i] A i j B[j] B j if(temp > 0) ans++; temp > 0 temp 0 ans++ ans System.out.println(ans) System.out.println System.out System System.out ans 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	}
} 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	}
} 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 A[][] = new int[N][M];
		int ans = 0;
		for(int i = 0; i < N; i++) {
			int temp = C;
			for(int j = 0; j < M; j++) {
				A[i][j] = sc.nextInt();
				temp = temp + A[i][j] * B[j];
				//System.out.println(temp);
			}
			//System.out.println(temp + ":");
			if(temp > 0) ans++;
		}
		System.out.println(ans);
	}
}
