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

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll A, B, C;
    cin >> A >> B >> C;

    ll year = 0;
    if(B+A-1 < C){
        ll money_per_loop = B + A - 1;
        ll loop = C / money_per_loop;
        C %= money_per_loop;
        year = A * loop;
    }
    
    if(C<A-1){
        p(year+C);
    }
    else{
        p(year+A);
    }
    
    return 0;
}