#include<iostream> #include<string> #include<cmath> #include<iomanip> using namespace std; int main(){ int c,s=0,ba,b = 0,n=0,k; cin>>c>>k; s += c; ba=c; while(ba >= k){ n = ba/k; b = ba%k; ba = n + b; s += n; } cout<<s; }