#include <bits/stdc++.h>
using namespace std;

int main()
{
    int64_t A, B, C;
    cin >> A >> B >> C;
    int64_t step = B+(A-1);
    int64_t tmp = C/step;
    int64_t tmp2 = A*tmp;
    int64_t tmp3 = tmp*step;

    int64_t ans = min(tmp2+(C-tmp3), tmp2+A);
    cout << ans << endl;
    return 0;
}