#include <bits/stdc++.h>
#include <atcoder/all>	
using namespace std;
using namespace atcoder;

int main(){
	
	long long  h, a;
	cin >> h >> a;

	queue <long long > q;
	q.push(h);
	
	long long  ans = 0;
	while(!q.empty()){
		ans ++;

		long long  H = q.front();
		q.pop();

		if(H / a > 0){
			q.push(H / a);
			q.push(H / a);
		}
	}	

	cout << ans << endl;
	
}