#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,c; cin>>a; cin>>b; if(a>b){ c=b;} else{ c=a;} while(c!=0){ if(a%c==0 && b%c==0){ cout<<c<<endl; break; } c--; } return 0; }