import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	}

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

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	}

} Main public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	} main {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	} 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 int counter = 0; counter 0 int total = 0; total 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++) {
			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 for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		} int T = 0; int T = 0; T 0 T<N T N T++ T++ T {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		} {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		} for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			} int i = 0; int i = 0; i 0 i<M i M i++ i++ i {
			 	total += A[T][i]*B[i];
			} {
			 	total += A[T][i]*B[i];
			} total += A[T][i]*B[i] total A[T][i]*B[i] A[T][i] A[T] A T i B[i] B i total += C total C if(total > 0) {
				counter++;
			} total > 0 total 0 {
				counter++;
			} counter++ counter total = 0 total 0 System.out.println(counter) System.out.println System.out System System.out counter String[] args args public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	}

} public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	}

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

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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];
		int counter = 0;
		int total = 0;
		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();
			}
		}
		
		for(int T = 0; T<N; T++) {
			for(int i = 0; i<M; i++) {
			 	total += A[T][i]*B[i];
			}
			total += C;
			if(total > 0) {
				counter++;
			}
			total = 0;
		}
		System.out.println(counter);
		
		
	}

}