#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <vector>
#include <string>
#include <algorithm>

int main(){
  register  long long int n,m;
  std::cin >> n >> m;
  register long long int mod = n % (1000*m);
  n -= mod;
  std::cout << n/m << std::endl;
}