add: product-of-array-except-self solved

Author: JiHyeonSu

product-of-array-except-self/JiHyeonSu.py

@@ -0,0 +1,17 @@
+class Solution:
+    def productExceptSelf(self, nums: List[int]) -> List[int]:
+        n = len(nums)
+        answer = [1] * n
+
+        left = 1
+        for i in range(n):
+            answer[i] = left
+            left *= nums[i]
+
+        right = 1
+        for i in reversed(range(n)):
+            answer[i] *= right
+            right *= nums[i]
+
+        return answer
+