#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;
}