#include <iostream>
#include <iomanip>
#include <cstring>
#include <algorithm> 
#include <math.h>
#include <queue>
#include <functional>
#include <map>
#include <vector>
#include <string>
using namespace std;
typedef long long ll;

int main(void){
    ll a, b, c;
    cin >> a >> b >> c;
    ll ans = 0;
    ans += a*(c / (a + b - 1));
    if ((a + b - 1)*(c / (a + b - 1)) + a - 1 < c){
        ans += a;
    }
    else{
        ans += c - (a + b - 1)*(c / (a + b - 1));
    }

    cout << ans << endl;
   
}