#include <iostream>
using namespace std;

int main(){
    
    long long int a,b,c,money,age;
    cin>>a>>b>>c;
    money = 0;
    age = a*(c/(a+b-1));
    c = c%(a+b-1);
    
    if(c<=a-1)age+=c;
    else age+=a;
    cout<<age<<endl;
    
}