#include <iostream> #include<iomanip> #include <cstring> using namespace std; int main(){ int cir,ba,sum = 0,newcir = 0,b = 0,k; cin>>cir; sum += cir; ba = cir; while(ba >= k){ newcir = ba/k; b = ba % k; ba = newcir + b; sum += newcir; } cout<<sum; }