//Name: Nguyen Tien Dat
//STUDENT ID: 19127356
//Ex13: Vi tri tuong doi cua 2 duong tron
#include <iostream>
using namespace std;
int main()
{
	int r1, r2, d, d1, d2;
	cout << "Nhap ban kinh r1: ";
	cin >> r1;
	cout << "Nhap ban kinh r2: ";
	cin >> r2;
	cout << "Nhap khoang cach: ";
	cin >> d;
	d1 = r1 + r2;
	d2 = abs((r1 - r2));
	if (r1 <= 0 || r2 <= 0 || d < 0) cout << "Thong tin khong chinh xac";
	else
	{
		if (d == 0)
		{
			if (r1 == r2) cout << "Hai duong tron chong len nhau\n";
			else cout << "Hai duong tron dong tam\n";
		}
		if (d1 < d) cout << "Hai duong tron roi nhau\n";
		if (d1 == d) cout << "Hai duong tron tiep xuc ngoai\n";
		if 
		if (d<d1 && d>d2) cout << "Hai duong tron cat nhau\n";
	}
}