3sum solution

Author: yyyyyyyyyKim

3sum/yyyyyyyyyKim.py

@@ -0,0 +1,36 @@
+class Solution:
+    def threeSum(self, nums: List[int]) -> List[List[int]]:
+        
+        answer = []
+
+        # 정렬
+        nums.sort()
+
+        for i in range(len(nums)-2):
+            # i 중복제거
+            if i > 0 and nums[i] == nums[i - 1]:
+                continue
+
+            left = i+1
+            right = len(nums)-1
+
+            while left < right:
+                if nums[i] + nums[left] + nums[right] == 0:
+                    answer.append([nums[i],nums[left],nums[right]])
+
+                    # left 중복제거
+                    while left < right and nums[left] == nums[left+1]:
+                        left += 1
+                    # right 중복제거
+                    while left < right and nums[right] == nums[right-1]:
+                        right -= 1
+                        
+                    left += 1
+                    right -= 1
+
+                elif nums[i] + nums[left] + nums[right] < 0:
+                    left += 1
+                else:
+                    right -= 1
+
+        return answer