3 sum LeetCode solution using Python - by Sarah

Python/3sum.py

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+# Leetcode Problem Link: https://leetcode.com/problems/3sum/
+# Name: Sarah Solarin
+# Github ID: Tu-code
+# File extension: .py
+
+class Solution:
+    # def threeSum(self, nums: List[int]) -> List[List[int]]:
+    def threeSum(self, nums):
+        ans = []
+        nums.sort()
+
+        for i, n in enumerate(nums):
+            if i > 0 and n == nums[i - 1]:
+                continue
+
+            l, r = i + 1, len(nums) - 1
+            while l < r:
+                threeSum = n + nums[l] + nums[r]
+                if threeSum > 0:
+                    r -= 1
+                elif threeSum < 0:
+                    l += 1
+                else:
+                    ans.append([n, nums[l], nums[r]])
+                    l += 1
+                    while nums[l] == nums[l - 1] and l < r:
+                        l += 1
+        return ans