
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    }
} Main public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    } main {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    } final Scanner sc = new Scanner(System.in); sc new Scanner(System.in) final int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc final int M = sc.nextInt(); M sc.nextInt() sc.nextInt sc final int C = sc.nextInt(); C sc.nextInt() sc.nextInt sc final 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 final int[][] A = new int[N][M]; A new int[N][M] N M 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 int answer = 0; answer 0 for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        } 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 += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        } {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        } int sum = C; sum C for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            } int j = 0; int j = 0; j 0 j < M j M ++j ++j j {
                sum += A[i][j]*B[j];
            } {
                sum += A[i][j]*B[j];
            } 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) {
                answer++;
            } sum > 0 sum 0 {
                answer++;
            } answer++ answer System.out.println(answer) System.out.println System.out System System.out answer System.out.flush() System.out.flush System.out System System.out sc.close() sc.close sc String[] args args public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    }
} public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    }
} Main

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);
        final int N = sc.nextInt();
        final int M = sc.nextInt();
        final int C = sc.nextInt();

        final int[] B = new int[M];
        for (int i = 0; i < M; ++i) {
            B[i] = sc.nextInt();
        }

        final int[][] A = new int[N][M];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M; ++j) {
                A[i][j] = sc.nextInt();
            }
        }

        int answer = 0;
        for (int i = 0; i < N; ++i) {
            int sum = C;
            for (int j = 0; j < M; ++j) {
                sum += A[i][j]*B[j];
            }
            if (sum > 0) {
                answer++;
            }
        }

        System.out.println(answer);
        System.out.flush();
        sc.close();
    }
}
