#include<iostream> // cin\cout\endl #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,b,i; cin>>a>>b; if(a>b) i=b; else i=a; while(i>=1){ if(a%1==0&&b%1==0) break; i--; } cout<<i<<endl; return 0; }