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authorVincent Ambo <mail@tazj.in>2021-12-13T22·51+0300
committerVincent Ambo <mail@tazj.in>2021-12-13T23·15+0300
commit019f8fd2113df4c5247c3969c60fd4f0e08f91f7 (patch)
tree76a857f61aa88f62a30e854651e8439db77fd0ea /users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py
parent464bbcb15c09813172c79820bcf526bb10cf4208 (diff)
parent6123e976928ca3d8d93f0b2006b10b5f659eb74d (diff)
subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
Diffstat (limited to 'users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py')
-rw-r--r--users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py45
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diff --git a/users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py b/users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py
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+++ b/users/wpcarro/scratch/data_structures_and_algorithms/find-unique-int-among-duplicates.py
@@ -0,0 +1,45 @@
+import unittest
+
+
+################################################################################
+# Solution
+################################################################################
+def find_unique_delivery_id(xs):
+    a = 0
+    for x in xs:
+        a ^= x
+    return a
+
+
+################################################################################
+# Tests
+################################################################################
+class Test(unittest.TestCase):
+    def test_one_drone(self):
+        actual = find_unique_delivery_id([1])
+        expected = 1
+        self.assertEqual(actual, expected)
+
+    def test_unique_id_comes_first(self):
+        actual = find_unique_delivery_id([1, 2, 2])
+        expected = 1
+        self.assertEqual(actual, expected)
+
+    def test_unique_id_comes_last(self):
+        actual = find_unique_delivery_id([3, 3, 2, 2, 1])
+        expected = 1
+        self.assertEqual(actual, expected)
+
+    def test_unique_id_in_middle(self):
+        actual = find_unique_delivery_id([3, 2, 1, 2, 3])
+        expected = 1
+        self.assertEqual(actual, expected)
+
+    def test_many_drones(self):
+        actual = find_unique_delivery_id(
+            [2, 5, 4, 8, 6, 3, 1, 4, 2, 3, 6, 5, 1])
+        expected = 8
+        self.assertEqual(actual, expected)
+
+
+unittest.main(verbosity=2)