From 7f71bd5267d77ae60a298ba595449ce2139d2079 Mon Sep 17 00:00:00 2001
From: ivan <ivan1016017@gmail.com>
Date: Tue, 23 Sep 2025 04:25:03 -0600
Subject: [PATCH] adding algo

---
 .../majority_element.py                       | 20 +++++++++++++++++++
 .../test_majority_element_round_20.py         | 17 ++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 src/my_project/interviews/top_150_questions_round_20/majority_element.py
 create mode 100644 tests/test_150_questions_round_20/test_majority_element_round_20.py

diff --git a/src/my_project/interviews/top_150_questions_round_20/majority_element.py b/src/my_project/interviews/top_150_questions_round_20/majority_element.py
new file mode 100644
index 00000000..ce87ab07
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_20/majority_element.py
@@ -0,0 +1,20 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def majorityElement(self, nums: List[int]) -> int:
+
+        dic_answer = dict()
+        len_nums = len(nums)
+
+        for i in range(len_nums):
+
+            if nums[i] not in dic_answer:
+                dic_answer[nums[i]] = 1
+            else: 
+                dic_answer[nums[i]] +=1 
+
+            if dic_answer[nums[i]] > len_nums//2:
+                return nums[i]
+            
+        return -1
\ No newline at end of file
diff --git a/tests/test_150_questions_round_20/test_majority_element_round_20.py b/tests/test_150_questions_round_20/test_majority_element_round_20.py
new file mode 100644
index 00000000..95d04391
--- /dev/null
+++ b/tests/test_150_questions_round_20/test_majority_element_round_20.py
@@ -0,0 +1,17 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_20\
+.majority_element import Solution
+
+class MajorityElementTestCase(unittest.TestCase):
+
+    def test_is_major_element(self):
+        solution = Solution()
+        output = solution.majorityElement(nums=[3,2,3])
+        target = 3
+        self.assertEqual(output, target)
+
+    def test_is_no_major_element(self):
+        solution = Solution()
+        output = solution.majorityElement(nums = [1,2,3])
+        target = -1
+        self.assertEqual(output, target)
\ No newline at end of file