ojnijjnikhikhj

[倪誉朔]

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