func_code_string: #include <bits/stdc++.h>   using namespace std;   template <class T>   ostream& operator<<(ostream& os, vector<T> V) {     os <<  [  ;     for (auto v : V) os << v <<    ;     return os <<  ] ;   }   template <class T>   ostream& operator<<(ostream& os, set<T> S) {     os <<  {  ;     for (auto s : S) os << s <<    ;     return os <<  } ;   }   template <class L, class R>   ostream& operator<<(ostream& os, pair<L, R> P) {     return os <<  (  << P.first <<  ,  << P.second <<  ) ;   }   template <class L, class R>   ostream& operator<<(ostream& os, map<L, R> M) {     os <<  {  ;     for (auto m : M) os <<  (  << m.F <<  :  << m.S <<  ) ;     return os <<  } ;   }   template <typename Arg1>   void __f(const char* name, Arg1&& arg1) {     cout << name <<   :   << arg1 << std::endl;   }   template <typename Arg1, typename... Args>   void __f(const char* names, Arg1&& arg1, Args&&... args) {     const char* comma = strchr(names + 1,  , );     cout.write(names, comma - names) <<   :   << arg1 <<   |  ;     __f(comma + 1, args...);   }   long long const M = 1e9;   bool check(long long v, long long n, long long k) {     long long s = n;     long long d = k;     while (n / k >= 1) {       s = s + n / k;       k = k * d;     }     return (s >= v);   }   int main() {     long long n, k;     cin >> n >> k;     long long l = 0;     long long r = M;     while (r - l > 1) {       long long mid = (l + r) >> 1;       if (check(n, mid, k))         r = mid;       else         l = mid;     }     cout << r <<   n ;     return 0;   }   