import 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        }
        System.out.println(count);
    }
} import java.util.*; util.* java 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 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[][] A = new int[N][M]; A new int[N][M] N M 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 sum = 0; sum 0 int count = 0; count 0 for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        } {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        } sum = C sum C for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            } int j=0; int j=0; j 0 j<M j M j++ j++ j {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            } {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            } A[i][j] = Integer.parseInt(sc.next()) A[i][j] A[i] A i j Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc sum += A[i][j] * B[j] sum A[i][j] * B[j] A[i][j] A[i] A i j B[j] B j if(sum > 0) {
                count++;
            } sum > 0 sum 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        }
        System.out.println(count);
    }
} Main
import 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[][] A = new int[N][M];
        int[] B = new int[M];
        for(int i=0; i<M; i++) {
            B[i] = Integer.parseInt(sc.next());
        }
        int sum = 0;
        int count = 0;
        for(int i=0; i<N; i++) {
            sum = C;
            for(int j=0; j<M; j++) {
                A[i][j] = Integer.parseInt(sc.next());
                sum += A[i][j] * B[j];
            }
            if(sum > 0) {
                count++;
            }
        }
        System.out.println(count);
    }
}