#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 > ans) {
			if (c - ans > a)ans += a;
			else ans += c - ans;
		}
	}
	else {
		ans += a-1;
		if (c > ans)ans++;
	}
	

	cout << ans << endl;


	return 0;




}