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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-260/
+"""
+
+Task 1: Unique Occurrences
+
+Submitted by: [42]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of integers, @ints.
+
+   Write a script to return 1 if the number of occurrences of each value
+   in the given array is unique or 0 otherwise.
+
+Example 1
+
+Input: @ints = (1,2,2,1,1,3)
+Output: 1
+
+The number 1 occurred 3 times.
+The number 2 occurred 2 times.
+The number 3 occurred 1 time.
+
+All occurrences are unique, therefore the output is 1.
+
+Example 2
+
+Input: @ints = (1,2,3)
+Output: 0
+
+Example 3
+
+Input: @ints = (-2,0,1,-2,1,1,0,1,-2,9)
+Output: 1
+
+Task 2: Dictionary Rank
+"""
+### solution by pokgopun@gmail.com
+
+def UO(tup: tuple):
+    s = set(tup)
+    return len(s)==len(set(tup.count(e) for e in s))
+
+import unittest
+
+class TestUO(unittest.TestCase):
+    def test(self):
+        for inpt, otpt in {
+                (1,2,2,1,1,3): 1,
+                (1,2,3): 0,
+                (-2,0,1,-2,1,1,0,1,-2,9): 1,
+                }.items():
+            self.assertEqual(UO(inpt),otpt)
+
+unittest.main()
+
+