#include <iostream>
using namespace std;
struct Point
{
	float x;
	float y;
};
struct Circle
{
	Point I; //center
	float r; //radius
};
void InputPoint(Point &d)
{
	cout << "\nCoordinates";
	cout << "\nx=";
	cin >> d.x;
	cout << "\ny=";
	cin >> d.y;
}
void InputCircle(Circle &C)
{
	cout << "\nInput center ";
	InputPoint(C.I);
	cout << "\nInput radius ";
	cin >> C.r;
}
float Distance(Point I1, Point I2)
{
	return sqrt(float(pow(I1.x - I2.x, 2) + pow(I1.y - I2.y, 2)));
}
bool Checkcollision(Circle C1, Circle C2)
{
	float dis;
	dis = Distance(C1.I, C2.I);
	float R = C1.r + C2.r;
	if (dis <= R)
		return true;
	return false;
}
void main()
{
	Circle C1, C2;
	InputCircle(C1);
	InputCircle(C2);
	if (Checkcollision(C1, C2)) cout << "collision" << endl;
	else
		cout << "dont collision" << endl;
	system("pause");


}