#include <iostream>
using namespace std;

int main()
{
    double ax, ay, bx, by, cx, cy, AB, BC, CA, p, square, h1, h2, h3;
    cin >> ax >> ay >> bx >> by >> cx >> cy;

    if (ay <= 0 || by <= 0 || cy <= 0)
    {
        cout << " Triangle is not in the top part";
        return 0;
    }

    AB = sqrt((bx - ax) * (bx - ax) + (by - ay) * (by - ay));
    BC = sqrt((cx - bx) * (cx - bx) + (cy - by) * (cy - by));
    CA = sqrt((ax - cx) * (ax - cx) + (ay - cy) * (ay - cy));
    p = (AB + BC + CA) / 2;
    square = sqrt(p * (p - AB) * (p - BC) * (p - CA));
    h1 = square * 2 / AB;
    h2 = square * 2 / BC;
    h3 = square * 2 / CA;

    cout << "Min height is " << min(min(h1, h2), h3);

    return 0;
}