#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; }