백준 온라인 저지(Baekjoon Online Judge) - 1002 : 터렛

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

1002번: 터렛

 

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int T;
    cin >> T;
    while (T--) {
        int x1, y1, r1, x2, y2, r2;
        cin >> x1 >> y1 >> r1 >> x2 >> y2 >> r2;
        double d = sqrt(pow(x2-x1,2) + pow(y2-y1,2));
        if (d == 0 && r1 == r2) {
            cout << -1 << endl;
        } else if (d > r1 + r2 || d < abs(r1-r2)) {
            cout << 0 << endl;
        } else if (d == r1 + r2 || d == abs(r1-r2)) {
            cout << 1 << endl;
        } else {
            cout << 2 << endl;
        }
    }
    return 0;
}