#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>>b; if(a>=b){ c=b; } else{ c=a; } while(1){ if(a%c==0 && b%c==0) break; c--; } cout<<c; return 0; }