#include <iostream>

using namespace std;

int gcd(int x, int y)
{
    for(int i = 1000; i > 0; i--)
        if(x % i == 0 && y % i == 0)
            return i;

    return 1;
}

int main()
{
    int x, y;
    cin >> x >> y;

    cout << gcd(x, y);

    return 0;
}