codechef INTEST - Enormous Input Test c++ solution

codechef INTEST - Enormous Input Test problem: http://www.codechef.com/problems/INTEST

All submissions for this problem are available.

The purpose of this problem is to verify whether the method you are using to read input data is sufficiently fast to handle problems branded with the enormous Input/Output warning. You are expected to be able to process at least 2.5MB of input data per second at runtime.

Input

The input begins with two positive integers n k (n, k<=10⁷). The next n lines of input contain one positive integer t_i, not greater than 10⁹, each.

Output

Write a single integer to output, denoting how many integers t_i are divisible by k.

Example

Input:
7 3
1
51
966369
7
9
999996
11

Output:
4

and here is my codechef INTEST - Enormous Input Test c++ solution: http://ideone.com/T05cEX

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

int main() {
 // your code goes here
 int a, b, c, d=0;
 scanf("%d %d", &a, &b);
 while (a--) {
  scanf("%d", &c);
  if(c%b==0) d++;
 }
 printf("%d", d);
 return 0;
}

Note: I was looking for "buffer c++" all over the web, but I could not get over it. c++ "cin" and "cout" makes some WA. so, instead, just try c "scanf" and "printf", that would be helpful, and easy to understand. "buffer" is extremely difficult to me to understand the code. good luck guys.