Untitled

#include <iostream>
#include <cmath>

using namespace std;

double dist(int x, int y) {
    return sqrt(pow(x, 2) + pow(y, 2));
}

int main() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int ax, ay, x1, y1, x2, y2;
    double res;
    cin >> ax >> ay >> x1 >> y1 >> x2 >> y2;

    x1 -= ax;
    x2 -= ax;
    y1 -= ay;
    y2 -= ay;

    if (x2 < x1) swap(x1, x2);
    if (y2 < y1) swap(y1, y2);

    res = min(min(dist(x1, y1), dist(x1, y2)), min(dist(x2, y1), dist(x2, y2)));

    if (x1 < 0 && x2 > 0) {
        res = min(res, (double)min(abs(y1), abs(y2)));
    }

    if (y1 < 0 && y2 > 0) {
        res = min(res, (double)min(abs(x1), abs(x2)));
    }

    printf("%.3f", res);
    return 0;
}