From e9489210c115b86b27ecc5e73c5440bb09c59e9a Mon Sep 17 00:00:00 2001
From: Paulo Custodio <pauloscustodio@gmail.com>
Date: Thu, 28 Oct 2021 18:25:14 +0100
Subject: Python solution to task 2 of challenge 123

---
 challenge-123/paulo-custodio/python/ch-2.py | 60 +++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 challenge-123/paulo-custodio/python/ch-2.py

diff --git a/challenge-123/paulo-custodio/python/ch-2.py b/challenge-123/paulo-custodio/python/ch-2.py
new file mode 100644
index 0000000000..0d4ef50456
--- /dev/null
+++ b/challenge-123/paulo-custodio/python/ch-2.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+
+# TASK #2 > Square Points
+# Submitted by: Mohammad S Anwar
+# You are given coordinates of four points i.e.
+# (x1, y1), (x2, y2), (x3, y3) and (x4, y4).
+#
+# Write a script to find out if the given four points form a square.
+#
+# Example
+# Input: x1 = 10, y1 = 20
+#        x2 = 20, y2 = 20
+#        x3 = 20, y3 = 10
+#        x4 = 10, y4 = 10
+# Output: 1 as the given coordinates form a square.
+#
+# Input: x1 = 12, y1 = 24
+#        x2 = 16, y2 = 10
+#        x3 = 20, y3 = 12
+#        x4 = 18, y4 = 16
+# Output: 0 as the given coordinates doesn't form a square.
+
+import sys
+
+class Point():
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+# square of distance between two points
+def dist_sq(p, q):
+    return (p.x - q.x) * (p.x - q.x) + \
+           (p.y - q.y) * (p.y - q.y)
+
+# check if four points form a square
+def is_square(p1, p2, p3, p4):
+    d2 = dist_sq(p1, p2)
+    d3 = dist_sq(p1, p3)
+    d4 = dist_sq(p1, p4)
+
+    if d2 == 0 or d3 == 0 or d4 == 0:
+        return False
+    elif d2 == d3 and 2 * d2 == d4 and 2 * dist_sq(p2, p4) == dist_sq(p2, p3):
+        return True
+    elif d3 == d4 and 2 * d3 == d2 and 2 * dist_sq(p3, p2) == dist_sq(p3, p4):
+        return True
+    elif d2 == d4 and 2 * d2 == d3 and 2 * dist_sq(p2, p3) == dist_sq(p2, p4):
+        return True
+    else:
+        return False
+
+p1 = Point(int(sys.argv[1]), int(sys.argv[2]))
+p2 = Point(int(sys.argv[3]), int(sys.argv[4]))
+p3 = Point(int(sys.argv[5]), int(sys.argv[6]))
+p4 = Point(int(sys.argv[7]), int(sys.argv[8]))
+
+if is_square(p1, p2, p3, p4):
+    print(1)
+else:
+    print(0)
-- 
cgit