
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    }
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int ans = 0; ans 0 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[][] 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] = 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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        } {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        } int score = 0; score 0 for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            } int j = 0; int j = 0; j 0 j < M j M j++ j++ j {
                score += A[i][j] * B[j];
            } {
                score += A[i][j] * B[j];
            } score += A[i][j] * B[j] score A[i][j] * B[j] A[i][j] A[i] A i j B[j] B j if(score + C > 0) ans++; score + C > 0 score + C score C 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 ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    }
} Main

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans = 0;
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        int[][] A = new int[N][M];
        int[] B = new int[M];
        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 i = 0; i < N; i++) {
            int score = 0;
            for(int j = 0; j < M; j++) {
                score += A[i][j] * B[j];
            }
            if(score + C > 0) ans++;
        }
        System.out.println(ans);
    }
}