ACMICPC 1002 : 터렛

http://www.acmicpc.net/problem/1002

<결과>

<코드>

#include<iostream>
using namespace std;

int main(){
	
	int num_cases = 0;
	cin >> num_cases;

	for (int i = 0; i < num_cases; ++i)
	{
		int d1, d2, d3;
		int x1, y1, r1, x2, y2, r2;
		
		cin >> x1 >> y1 >> r1 >> x2 >> y2 >> r2;

		d1 = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
		d2 = (r1 + r2) * (r1 + r2);

		if (x1 == x2 && y1 == y2 && r1 == r2)
		{
			cout << -1 << endl;
		}
		else
		{
			if (d1 > d2) 
				cout << 0 << endl;
			else if (d1 == d2)
				cout << 1 << endl;
			else if (d1 < d2) 
			{
				d3 = (r2 - r1) * (r2 - r1);
				if (d1 == d3)
					cout << 1 << endl;
				else if (d1 < d3)
					cout << 0 << endl;
				else
					cout << 2 << endl;
			}
		}
	}
	return 0;
}