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)

namespace ABC121 {
  class ProblemB {
    static void Main(string[] args) {
      string[] str1 = System.Console.ReadLine().Split(' '), str2 = System.Console.ReadLine().Split(' ');
      int n = int.Parse(str1[0]), m = int.Parse(str1[1]), c = int.Parse(str1[2]);
      int[] b = new int[m];
      for (int i = 0; i < m; i++) {
        b[i] = int.Parse(str2[i]);
      }
      string[][] str3 = new string[n][];
      for (int i = 0; i < n; i++) {
        str3[i] = System.Console.ReadLine().Split(' ');
      }
      int[][] a = new int[n][];
      for (int i = 0; i < n; i++) {
        a[i] = new int[m];
        for (int j = 0; j < m; j++) {
          a[i][j] = int.Parse(str3[i][j]);
        }
      }

      int ans = 0;
      for (int i = 0; i < n; i++) {
        int expr = c;
        for (int j = 0; j < m; j++) {
          expr += a[i][j] * b[j];
        }
        if (expr > 0) ans++;
      }
      System.Console.WriteLine(ans);
    }
  }
}