Merge remote-tracking branch 'upstream/master'

1 files changed, 35 insertions, 0 deletions

diff --git a/challenge-123/abigail/java/ch-2.java b/challenge-123/abigail/java/ch-2.java
new file mode 100644
index 0000000000..8d13bcf8bf
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+++ b/challenge-123/abigail/java/ch-2.java
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+//
+// See ../README.md
+//
+
+//
+// Run as: ln ch-2.java ch2.java; javac ch2.java; java ch2 < input-file
+//
+
+import java.util.*;
+
+public class ch2 {
+    public static void main (String [] args) {
+        Scanner scanner = new Scanner (System . in);
+        while (scanner . hasNext ()) {
+            int x1 = scanner . nextInt ();
+            int y1 = scanner . nextInt ();
+            int x2 = scanner . nextInt ();
+            int y2 = scanner . nextInt ();
+            int x3 = scanner . nextInt ();
+            int y3 = scanner . nextInt ();
+            int x4 = scanner . nextInt ();
+            int y4 = scanner . nextInt ();
+
+            int e1 = (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
+            int e2 = (x2 - x3) * (x2 - x3) + (y2 - y3) * (y2 - y3);
+            int e3 = (x3 - x4) * (x3 - x4) + (y3 - y4) * (y3 - y4);
+            int e4 = (x4 - x1) * (x4 - x1) + (y4 - y1) * (y4 - y1);
+            int d1 = (x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3);
+            int d2 = (x2 - x4) * (x2 - x4) + (y2 - y4) * (y2 - y4);
+
+            System . out . println (e1 == e2 && e2 == e3 &&
+                                    e3 == e4 && d1 == d2 ? 1 : 0);
+        }
+    }
+}