#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <map>


using namespace std;

int main(){
	int a,b,c;scanf("%d%d%d",&a,&b,&c);
	long long cm=a*b;if(a>b)swap(a,b);
	int ans= 2*1000000000;
	if(cm>c){for(int i=0;i-b<=c;i+=b){int tmp=i+(c-i+a-1)/a*a;if(ans>tmp)ans=tmp;}}
	else{
		int md=0;
		map<int,int> mp;
		for(int i=0;i-b<=c;i+=b){
			int tmp=i+(c-i+a-1)/a*a;
			if(tmp%a){
				if(mp[tmp%a]){ans=mp[md];break;}
				else{mp[tmp%a]=tmp;md=min(tmp%a,md);}
			}
			else{
				printf("%d\n",ans=tmp);
				return 0;
			}
		}
	}
	printf("%d\n",ans);
	
	
	
	return 0;
}