#include <iostream>

using namespace std;
int main(void){
    long long A,B,C;
    cin >> A >> B >> C;
   
    long long block;
    block = (A - 1) + B;
    
    int i;
    for(i = 0;C >= block;i += A)
    {
        C -= block;    
    }
    if(A > C)
    {
        cout << i + C;
    }
    else
    {
        cout << i + A;
    }
}