#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(i,a) for(int i=0;i<(a);i++)
#define MOD 1000000007

int main(){
  ll A,B,C;cin>>A>>B>>C;
  ll x=C/(A+B-1),ans=x*A;
  ll res=C-(A+B-1)*x;
  if(res>A){
    ans+=A;
    res-=(A+B-1);
  }
  if(res<=0) cout<<ans<<endl;
  else cout<<ans+res<<endl;
  return 0;
}