#include<iostream> #include<iomanip> using namespace std; int main() { //每5根换一根 int cir,sum = 0,ba,b = 0,newcir = 0,k;//30 cin>>cir>>k; sum += cir; ba = cir; while(ba >= k){ newcir = ba/k; b = ba % k; ba = newcir + b; sum += newcir; } cout<<sum; }