#include <iostream>
using namespace std;
int main() {
    int n, x;
    cin >> n >> x;
    int total_mL = n * 1000;
    int cups = (total_mL + x - 1) / x;
    cout << cups << endl;
    return 0;
}
/**************************************************************
	Problem: 1309
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/