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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-283/
+"""
+
+Task 2: Digit Count Value
+
+Submitted by: [46]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of positive integers, @ints.
+
+   Write a script to return true if for every index i in the range 0 <= i
+   < size of array, the digit i occurs exactly the $ints[$i] times in the
+   given array otherwise return false.
+
+Example 1
+
+Input: @ints = (1, 2, 1, 0)
+Ouput: true
+
+$ints[0] = 1, the digit 0 occurs exactly 1 time.
+$ints[1] = 2, the digit 1 occurs exactly 2 times.
+$ints[2] = 1, the digit 2 occurs exactly 1 time.
+$ints[3] = 0, the digit 3 occurs 0 time.
+
+Example 2
+
+Input: @ints = (0, 3, 0)
+Ouput: false
+
+$ints[0] = 0, the digit 0 occurs 2 times rather than 0 time.
+$ints[1] = 3, the digit 1 occurs 0 time rather than 3 times.
+$ints[2] = 0, the digit 2 occurs exactly 0 time.
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 25th August
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+def dcv(ints):
+    idx = range(len(ints))
+    return set((i,ints.count(i)) for i in idx) == set((i,ints[i]) for i in idx)
+
+import unittest
+
+class TetDcv(unittest.TestCase):
+    def test(self):
+        for inpt, otpt in {
+                (1, 2, 1, 0): True,
+                (0, 3, 0): False,
+                }.items():
+            self.assertEqual(dcv(inpt),otpt)
+
+unittest.main()