#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

#define REP(i,n) for(int i = 0; i < (n); ++i)
#define P(x) cout << (x) << "\n"
#define D(x) cerr << (x) << "\n"
#define fcout cout << fixed << setprecision(18)

using i64=long long int; // 10^18

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  
  i64 a,b,c;cin>>a>>b>>c;
  i64 n = c/(a+b-1);
  i64 m = (c-n*(a+b-1)) - (a-1);
  i64 ans = n*a + (m>0 ? a : m + a-1);
  P(ans);

  return 0;
}