#include <iostream>

using namespace std;
int main() {
	double x_1, x_2, y_1, y_2, distance;

	cout << "Enter the coordinates of the first point:" << endl;
	cout << " X = ";
	cin >> x_1;
	cout << " Y = ";
	cin >> y_1;
	cout << endl << "Enter the coordinates of the second point:" << endl;
	cout << " X = ";
	cin >> x_2;
	cout << " Y = ";
	cin >> y_2;

	distance = sqrt((x_2 - x_1) * (x_2 - x_1) + (y_2 - y_1) * (y_2 - y_1));
	cout << endl << "The distance between [" << x_1 << ";" << y_1 << "] and [" << x_2 << ";" << y_2 << "] is " << distance;
	return 0;
}