#include <bits/stdc++.h> using namespace std; #define int long long template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } signed main(){ int v, t, p; cin >> v >> t >> p; int ans = (p+1)*v + 1; int tmp = ans-1; while(tmp >= t){ int plus = tmp / t; ans += plus; tmp = plus + tmp%t; } cout << ans << endl; return 0; }