#include<bits/stdc++.h>
using namespace std;
using ll=long long;

int main(){
  ll h,a;
  cin>>h>>a;
  queue<ll> que;
  que.push(h);
  ll ans=0;
  while(que.size()){
    ll q=que.front();
    que.pop();
    ll nh=q/a;
    ans++;
    if(nh>0){
      que.push(nh);
      que.push(nh);
    }
  }
  cout<<ans<<endl;
}