#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,s,k,l;
    scanf("%d %d",&n,&s);
    k=n*1000;
    l=(k+s-1)/s;
	printf("%d",l); 	
}
/**************************************************************
	Problem: 1309
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/