#include <iostream>
// #include <time.h>

using namespace std;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	unsigned long long a, b, c;

	cin >> a >> b >> c;

    auto start = clock();
	unsigned long long delta = (a - 1);
	if (delta > c) {
		cout << c;
// 		cout << "\n" << clock() - start << endl;
	}
	else {
	unsigned long long delta2 = delta + b;
		if (delta2 > c) {
			cout << a;
// 			cout << "\n" << clock() - start << endl;
		}
		else {
			unsigned long long n = (unsigned long long)(c / delta2);
			if (delta + n*delta2 > c) {
				cout << c + n * (a - delta2);
				// 		cout << "\n" << clock() - start << endl;

			}
			else {
				cout << a * (n + 1);
				// 		cout << "\n" << clock() - start << endl;

			}
		}
	}
}