#include<bits/stdc++.h>
using namespace std;
int gcd(int a,int b,int c)
{
if(a%b==0&&a%c==0&&b%c==0)
return a;
else
return (b,a%b,a%b%c);
 
}
int main(){
	long long a,b,c;
	cin>>a>>b>>c;
	cout<<gcd(a,b,c);
    return 0;
}