#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,x;
	cin>>n>>x;
	if(n*1000%x!=0){
		cout<<n*1000/x+1;
	}else{
		cout<<n*1000/x;
	}
}
/**************************************************************
	Problem: 1309
	User: linzihang
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/