using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = long.Parse(line[0]);
        var b = long.Parse(line[1]);
        var c = long.Parse(line[2]);
        getAns(a, b, c);
    }
    static void getAns(long a, long b, long c)
    {
        var s = a + b - 1;
        var t = c / s;
        var t2 = c % s;
        if (t * s + a - 1 >= c) Console.WriteLine(t * a + t2);
        else Console.WriteLine(t * a + a);
    }
}