feat: add top k frequent elements solution

Author: mangodm-web

top-k-frequent-elements/dm.py

@@ -0,0 +1,21 @@
+from typing import List
+
+
+class Solution:
+    def topKFrequent(self, nums: List[int], k: int) -> List[int]:
+        count_dict = {}
+        frequency_bucket = [[] for i in range(len(nums) + 1)]
+        result = []
+
+        for num in nums:
+            count_dict[num] = count_dict.get(num, 0) + 1
+
+        for num, count in count_dict.items():
+            frequency_bucket[count].append(num)
+
+        for i in range(len(frequency_bucket) - 1, 0, -1):
+            for num in frequency_bucket[i]:
+                result.append(num)
+
+                if len(result) == k:
+                    return result