#include<iostream> using namespace std; int main(){ int a, b, c, min, a1, b1, c1; cin >> a >> b >> c; min = a; if (b < min){ min = b; } if (c < min){ min = c; } for (int x=2; x<=min; x++){ a1 = a%x; b1 = b%x; c1 = c%x; if (a1 == b1 && b1 == c1){ cout << x; break; } } return 0; }