#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    ll h, a;
    cin >> h >> a;
    queue<P> q;
    q.push({h,1});
    ll ans = 0;
    while(!q.empty()){
        auto [u, num] = q.front();q.pop();
        ans+=num;
        ll nu = u/a;
        if(nu>0){
            q.push({nu, num*2});
        }
    }
    cout << ans << endl;
    return 0;
}