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++14 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include <iostream>
#include <vector>
using namespace std;

int main() {
  int N = 0;
  int M = 0;
  int C = 0;
  std::cin >> N >> M >> C;
  std::vector<int> B(M, 0);

  for (int i = 0; i < B.size(); i++) {
    int a = 0;
    std::cin >> a;
    B[i] = a;
  }

  std::vector<int> A_i_row(N, 0);
  std::vector<std::vector<int>> A(M, A_i_row);

  int counter = 0;
  for (int i = 0; i < A.size(); i++) {
    int judge = C;
    for (int j = 0; j < A[i].size(); j++) {
      int a = 0;
      std::cin >> a;
      A[i][j] = a;
      judge += a * B[j];
    }
    if (judge > 0) {
      counter += 1;
    }
  }
  std::cout << counter << std::endl;
  return 0;
}