#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,b,t; cin>>a>>b; while(t!=0){ if(a%t==0&&b%t==0){ cout<<t; return 0; } t--; } cout<<t; return 0; }