#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,x=2; cin>>a>>b>>c; while(!(a%x==b%x&&b%x==c%x)){ x++; } cout<<x<<" "; return 0; }