import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
    public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    }
} Main public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    } main {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    } try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        } catch(IOException e){
            e.printStackTrace();
        } IOException e {
            e.printStackTrace();
        } e.printStackTrace() e.printStackTrace e {
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        } BufferedReader input = new BufferedReader(new InputStreamReader(System.in)) BufferedReader input = new BufferedReader(new InputStreamReader(System.in)) new BufferedReader(new InputStreamReader(System.in)) String[] l1 = input.readLine().split(" "); l1 input.readLine().split(" ") input.readLine().split input.readLine() input.readLine input " " int N = Integer.parseInt(l1[0]); N Integer.parseInt(l1[0]) Integer.parseInt Integer l1[0] l1 0 int M = Integer.parseInt(l1[1]); M Integer.parseInt(l1[1]) Integer.parseInt Integer l1[1] l1 1 int C = Integer.parseInt(l1[2]); C Integer.parseInt(l1[2]) Integer.parseInt Integer l1[2] l1 2 String[] l2 = input.readLine().split(" "); l2 input.readLine().split(" ") input.readLine().split input.readLine() input.readLine input " " int[] B = new int[M]; B new int[M] M for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            } int i = 0; int i = 0; i 0 i < M i M i++ i++ i {
                B[i] = Integer.parseInt(l2[i]);
            } {
                B[i] = Integer.parseInt(l2[i]);
            } B[i] = Integer.parseInt(l2[i]) B[i] B i Integer.parseInt(l2[i]) Integer.parseInt Integer l2[i] l2 i int[][] data = new int[N][M]; data new int[N][M] N M int cnt = 0; cnt 0 for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            } {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            } int calc = 0; calc 0 String[] lines = input.readLine().split(" "); lines input.readLine().split(" ") input.readLine().split input.readLine() input.readLine input " " for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    } {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    } calc += Integer.parseInt(lines[j]) * B[j] calc Integer.parseInt(lines[j]) * B[j] Integer.parseInt(lines[j]) Integer.parseInt Integer lines[j] lines j B[j] B j if (calc + C > 0)
                        cnt++; calc + C > 0 calc + C calc C 0 cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt String[] args args public class Main {
    public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    }
} public class Main {
    public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) {
        try(BufferedReader input = new BufferedReader(new InputStreamReader(System.in))){
 
			String[] l1 = input.readLine().split(" ");
			int N = Integer.parseInt(l1[0]);
			int M = Integer.parseInt(l1[1]);
            int C = Integer.parseInt(l1[2]);

            String[] l2 = input.readLine().split(" ");
            int[] B = new int[M];
            for (int i = 0; i < M; i++) {
                B[i] = Integer.parseInt(l2[i]);
            }

            int[][] data = new int[N][M];
            int cnt = 0;

            for (int i = 0; i < N; i++) {
                    int calc = 0;
                    String[] lines = input.readLine().split(" ");
                    for (int j = 0; j < M; j++) {
                        calc += Integer.parseInt(lines[j]) * B[j];
                    }
                    if (calc + C > 0)
                        cnt++;
            }

                System.out.println(cnt);
        }catch(IOException e){
            e.printStackTrace();
        }
    }
}