[백준]1002-터렛(설명X)

#include <iostream>
#include <cmath>
using namespace std;
 
int main() {
    int input;
    cin >> input;
    for (int i = 0; i < input; i++) {
        int x1, y1, r1, x2, y2, r2;
        cin >> x1 >> y1 >> r1 >> x2 >> y2 >> r2;
        double length = sqrt(pow(x1 - x2, 2) + pow(y1 - y2, 2));
        
        if (x1 == x2 && y1 == y2) {
            if (r1 == r2)
                cout << -1 << endl;
            else
                cout << 0 << endl;
        }
        else {
            if (length<r1 + r2 && length>abs(r1 - r2))
                cout << 2 << endl;
            else if (length == r1 + r2 || abs(r1 - r2) == length)
                cout << 1 << endl;
            else
                cout << 0 << endl;
        }
    }
}