import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long A = scan.nextLong();
		long B = scan.nextLong();
		long C = scan.nextLong();
		scan.close();
		long t = C / (A + B - 1);
		//long ans = t * A + Math.min(A, C % (A + B - 1));
		//System.out.println(ans);
		System.out.println(t * A + Math.min(C - t * (A + B - 1), A));
	}
}