diff --git a/data_structures/arrays/kadanes_algorithm.py b/data_structures/arrays/kadanes_algorithm.py
new file mode 100644
index 000000000000..2650d6a7e03a
--- /dev/null
+++ b/data_structures/arrays/kadanes_algorithm.py
@@ -0,0 +1,30 @@
+"""Given an integer array nums, find the subarray with the largest sum, and return its sum.
+Example 1:
+Input: nums = [-2,1,-3,4,-1,2,1,-5,4]
+Output: 6
+Explanation: The subarray [4,-1,2,1] has the largest sum 6.
+Example 2:
+Input: nums = [1]
+Output: 1
+Explanation: The subarray [1] has the largest sum 1.
+Example 3:
+Input: nums = [5,4,-1,7,8]
+Output: 23
+Explanation: The subarray [5,4,-1,7,8] has the largest sum 23.
+"""
+
+
+def max_subArray(self, nums: List[int]) -> int:
+    # kadane's algorithm#
+    curr = 0
+    maxtillnow = -inf
+    for c in nums:
+        curr = max(c, curr + c)
+        maxtillnow = max(curr, maxtillnow)
+    return maxtillnow
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
diff --git a/other/two_sum_advance.py b/other/two_sum_advance.py
new file mode 100644
index 000000000000..52f3fe3cc463
--- /dev/null
+++ b/other/two_sum_advance.py
@@ -0,0 +1,43 @@
+"""Pointer Solution
+Example 1:
+
+Input: numbers = [2,7,11,15], target = 9
+Output: [1,2]
+Explanation: The sum of 2 and 7 is 9.
+Therefore, index1 = 1, index2 = 2. We return [1, 2].
+Example 2:
+
+Input: numbers = [2,3,4], target = 6
+Output: [1,3]
+Explanation: The sum of 2 and 4 is 6.
+Therefore index1 = 1, index2 = 3. We return [1, 3].
+Example 3:
+
+Input: numbers = [-1,0], target = -1
+Output: [1,2]
+Explanation: The sum of -1 and 0 is -1.
+Therefore index1 = 1, index2 = 2. We return [1, 2].
+"""
+
+
+def two_sum(self, numbers: list[int], target: int) -> list[int]:
+    n = len(numbers)
+    l = 0
+    r = n - 1
+    res = []
+    while l < r:
+        if numbers[l] + numbers[r] == target:
+            res.append(l + 1)
+            res.append(r + 1)
+        if numbers[l] + numbers[r] > target:
+            r -= 1
+        else:
+            l += 1
+    res.sort()
+    return res
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
diff --git a/requirements.txt b/requirements.txt
index acfbc823e77f..2702523d542e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,7 @@ pandas
 pillow
 projectq
 qiskit
+qiskit-aer
 requests
 rich
 scikit-fuzzy