#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <sstream>
#include<set>
#include<stack>

//#include<bits/stdc++.h>


using namespace std;



int main() {


	long long int a, b, c;
	cin >> a >> b >> c;
	long long int n;
	n = b + a - 1;
	long long int ans = 0;
	if (c / n > 0) {
		ans += (c / n)*a;
		if (c%n) {
			if (c%n > a)ans += a;
			else ans += c%n;
		}
	}
	else {
		if (a > c)ans = c;
		else ans = a;
	//	ans += a - 1;
	//	if (c > ans)ans++;
	}


	cout << ans << endl;


	return 0;




}