week 37

Author: leesangeok

week37/이상억/backjoon/터렛.java

@@ -1,8 +1,55 @@
+// (1) 같은 원 -1
+// (2) 교점이 없음 0
+// (3) 원 안에 원 0
+// (4) 한 점에서 만남 1
+// (5) 두 점에서 만남
+
 import java.util.*;
 import java.io.*;
 
 public class Main{
     public static void main(String[] args) throws IOException{
-        BufferedReader br = new BufferedReader(new InputStreamReader(Systme.in));
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringBuilder sb = new StringBuilder();
+
+        int N = Integer.parseInt(br.readLine());
+
+        for(int i = 0; i < N; i++){
+            StringTokenizer st = new StringTokenizer(br.readLine());
+
+            int x1 = Integer.parseInt(st.nextToken());
+            int y1 = Integer.parseInt(st.nextToken());
+            int r1 = Integer.parseInt(st.nextToken());
+
+            int x2 = Integer.parseInt(st.nextToken());
+            int y2 = Integer.parseInt(st.nextToken());
+            int r2 = Integer.parseInt(st.nextToken());
+
+            int result = circle_option(x1, y1, r1 , x2, y2, r2);
+            sb.append(result).append('\n');
+        }
+        System.out.print(sb);
+    }
+
+    public static int circle_option(int x1, int y1, int r1, int x2, int y2, int r2){
+
+        int dx = x1 - x2;
+        int dy = y1 - y2;
+        int d = dx*dx + dy*dy;
+
+        int sum = r1 + r2;
+        int diff = Math.abs(r1 - r2);
+
+        if (d == 0 && r1 == r2) {
+            return -1;
+        } else if (d > sum*sum) {
+            return 0;
+        } else if (d < diff*diff) {
+            return 0;
+        } else if (d == sum*sum || d == diff*diff) {
+            return 1;
+        } else {
+            return 2;
+        }
     }
-}
+}