Problem:
Score : 200 points

Problem Statement

There are N pieces of source code. The characteristics of the i-th code is represented by M integers A_{i1}, A_{i2}, ..., A_{iM}.

Additionally, you are given integers B_1, B_2, ..., B_M and C.

The i-th code correctly solves this problem if and only if A_{i1} B_1 + A_{i2} B_2 + ... + A_{iM} B_M + C > 0.

Among the N codes, find the number of codes that correctly solve this problem.

Constraints

All values in input are integers.

1 \leq N, M \leq 20

-100 \leq A_{ij} \leq 100

-100 \leq B_i \leq 100

-100 \leq C \leq 100

Input

Input is given from Standard Input in the following format:

N M C
B_1 B_2 ... B_M
A_{11} A_{12} ... A_{1M}
A_{21} A_{22} ... A_{2M}
\vdots
A_{N1} A_{N2} ... A_{NM}

Output

Print the number of codes among the given N codes that correctly solve this problem.

Sample Input 1

2 3 -10
1 2 3
3 2 1
1 2 2

Sample Output 1

1

Only the second code correctly solves this problem, as follows:

Since 3 \times 1 + 2 \times 2 + 1 \times 3 + (-10) = 0 \leq 0, the first code does not solve this problem.

1 \times 1 + 2 \times 2 + 2 \times 3 + (-10) = 1 > 0, the second code solves this problem.

Sample Input 2

5 2 -4
-2 5
100 41
100 40
-3 0
-6 -2
18 -13

Sample Output 2

2

Sample Input 3

3 3 0
100 -100 0
0 100 100
100 100 100
-100 100 100

Sample Output 3

0

All of them are Wrong Answer. Except yours.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Linq;
using System.Collections.Generic;

class Program
{

    static void Main(string[] args)
    {
        var inputs = Console.ReadLine().Split(' ');
        int N = int.Parse(inputs[0]);
        int M = int.Parse(inputs[1]);
        int C = int.Parse(inputs[2]);

        inputs = Console.ReadLine().Split(' ');
        var B = new int[inputs.Length];
        for (int i = 0; i < B.Length; i++)
        {
            B[i] = int.Parse(inputs[i]);
        }

        var A = new int[N, M];
        for (int i = 0; i < N; i++)
        {
            inputs = Console.ReadLine().Split(' ');
            for (int j = 0; j < inputs.Length; j++)
            {
                A[i, j] = int.Parse(inputs[j]);
            }
        }

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

        Console.WriteLine(count);
    }

}