using namespace std; #include void _main();int main(){cin.tie(0);ios::sync_with_stdio(false);cout<inline bool chmax(ll&a,ll b){if(ainline bool chmin(ll& a,ll b){if(a>b){a=b;return 1;}return 0;} #define rep1(a) for(int i = 0; i < a; i++) #define rep2(i, a) for(int i = 0; i < a; i++) #define rep3(i, a, b) for(int i = a; i < b; i++) #define rep4(i, a, b, c) for(int i = a; i < b; i += c) #define overload4(a, b, c, d, e, ...) e #define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__) #define ALL(x) std::begin(x),std::end(x) #define INF ((1LL<<62)-(1LL<<31)) #define bit(x,i) (((x)>>(i))&1) #define fi first #define se second #define pb push_back #define Endl endl #define spa " " #define YesNo(x) cout<<(x?"Yes":"No")< inline void scan(Head&head,Tail&... tail){std::cin>>head;scan(tail...);} #define LL(...) ll __VA_ARGS__;scan(__VA_ARGS__) #define STR(...) string __VA_ARGS__;scan(__VA_ARGS__) template std::istream &operator>>(std::istream&is,std::vector&v){for(T &in:v){is>>in;}return is;} template std::ostream &operator<<(std::ostream&os,const std::vector&v){for(auto it=std::begin(v);it!=std::end(v);){os<<*it<<((++it)!=std::end(v)?" ":"");}return os;} long double my_distance(long double xi,long double yi,long double xj,long double yj){return sqrt(abs((xi-xj)*(xi-xj))+abs((yi-yj)*(yi-yj)));} void print(){ cout << '\n'; } template void print(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; } template constexpr auto min(T... a){ return min(initializer_list>{a...}); } template constexpr auto max(T... a){ return max(initializer_list>{a...}); } //Union-Find from https://zenn.dev/reputeless/books/standard-cpp-for-competitive-programming/vi((b%2==0?b-1:b)+2-(a%2==0?a+1:a))/2er/union-find class UnionFind{public:UnionFind()=default;explicit UnionFind(size_t n):m_parentsOrSize(n, -1){}int find(int i){if(m_parentsOrSize[i]<0){return i;}return(m_parentsOrSize[i]=find(m_parentsOrSize[i]));}void merge(int a,int b){a=find(a);b=find(b);if(a!=b){if(-m_parentsOrSize[a]<-m_parentsOrSize[b]){std::swap(a,b);}m_parentsOrSize[a]+=m_parentsOrSize[b];m_parentsOrSize[b]=a;}}bool connected(int a,int b){return (find(a)==find(b));}int size(int i){return -m_parentsOrSize[find(i)];}private:std::vectorm_parentsOrSize;}; //ll MOD = INF; //ll MOD = 1000000007; ll MOD = 998244353; bool iskaibun(string s){ll k = s.size();rep(i,0,k/2){if(s[i]!=s[k-1-i]){return false;}}return true;} #include using namespace atcoder; string replace(const string&moto,const string &from, const string&too) { int from_len = from.size(); string tmp = from + moto; int tmp_len = tmp.size(); vector za = z_algorithm(tmp); string ret = ""; for (int i = from_len; i < tmp_len;) { if (za[i] >= from_len) { ret += too; i += from_len; } else { ret += tmp[i]; i++; } } return ret; } ll zaatu(vector&A){ mapm; for(auto&&x:A)m[x]=0; ll ret = 0; for(auto&&[key,val]:m)val=ret++; for(auto&&x:A)x=m[x]; return ret; } //約数列挙 vectorenumdiv(ll n){ vectors; for(ll i = 1;i*i<=n;i++){ if(n%i==0){s.push_back(i);if(i*i!=n)s.push_back(n/i);} } return s; } vector topo_sort(vector>&G,vector&nyu_cnt,ll v){ vectorret; priority_queue,greater>pq; rep(i,0,v){ if(nyu_cnt[i]==0)pq.push(i); } while(!pq.empty()){ ll pos = pq.top();pq.pop(); for(ll i:G[pos]){ nyu_cnt[i]--; if(nyu_cnt[i]==0)pq.push(i); } ret.push_back(pos); } return ret; } vector> soinsu_bunkai(ll x){ vector>ret; rep(i,2,sqrt(x)+1){ if(x%i==0){ ll cnt{}; while(x%i==0){ x/=i; cnt++; } ret.push_back({i,cnt}); } } if(x!=1)ret.push_back({x,1}); return ret; } const int MAX = 1010000; long long fac[MAX], finv[MAX], inv[MAX]; void COMinit(){ fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; } vector isprime; vector Era(int n) { isprime.resize(n, true); vector res; isprime[0] = false; isprime[1] = false; for (int i = 2; i < n; ++i) isprime[i] = true; for (int i = 2; i < n; ++i) { if (isprime[i]) { res.push_back(i); for (int j = i*2; j < n; j += i) isprime[j] = false; } } return res; } using mint = modint998244353; void _main(){ LL(h,a); ll ans{},now=1; while(h>0){ h/=a; ans+=now; now*=2; } cout<