diff --git a/src/my_project/interviews/top_150_questions_round_23/ex_03_remove_duplicates_i.py b/src/my_project/interviews/top_150_questions_round_23/ex_03_remove_duplicates_i.py
new file mode 100644
index 00000000..c9563896
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_23/ex_03_remove_duplicates_i.py
@@ -0,0 +1,18 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def removeDuplicates(self, nums: List[int]) -> int:
+
+        j = 0
+        len_nums = len(nums)
+
+        for i in range(len_nums - 1):
+
+            if nums[i] != nums[i+1]:
+                nums[j] = nums[i]
+                j += 1
+
+        nums[j] = nums[len_nums - 1]
+
+        return j + 1
\ No newline at end of file
diff --git a/src/my_project/interviews_typescript/top_150_questions_round_23/ex_03_remove_duplicates_i.ts b/src/my_project/interviews_typescript/top_150_questions_round_23/ex_03_remove_duplicates_i.ts
new file mode 100644
index 00000000..839b537e
--- /dev/null
+++ b/src/my_project/interviews_typescript/top_150_questions_round_23/ex_03_remove_duplicates_i.ts
@@ -0,0 +1,15 @@
+function removeDuplicates(nums: number[]): number {
+    let j = 0;
+    const lenNums = nums.length;
+
+    for (let i = 0; i < lenNums - 1; i++) {
+        if (nums[i] !== nums[i + 1]) {
+            nums[j] = nums[i];
+            j++;
+        }
+    }
+
+    nums[j] = nums[lenNums - 1];
+
+    return j + 1;
+};
\ No newline at end of file
diff --git a/tests/test_150_questions_round_23/test_03_remove_duplicates_i_round_23.py b/tests/test_150_questions_round_23/test_03_remove_duplicates_i_round_23.py
new file mode 100644
index 00000000..90ddb7e4
--- /dev/null
+++ b/tests/test_150_questions_round_23/test_03_remove_duplicates_i_round_23.py
@@ -0,0 +1,11 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_23\
+.ex_03_remove_duplicates_i import Solution
+
+class RemoveDuplicatesTestCase(unittest.TestCase):
+
+    def test_remove_duplicates(self):
+        solution = Solution()
+        output = solution.removeDuplicates(nums=[1,1,2])
+        target = 2
+        self.assertEqual(output, target)
\ No newline at end of file