Create 3392. Count Subarrays of Length Three With a Condition.py

Author: 724thomas

leetcode3/최원준/3392. Count Subarrays of Length Three With a Condition.py

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+#
+
+'''
+1. 아이디어 :
+-
+
+2. 시간복잡도 :
+    O(n-2)
+
+3. 자료구조/알고리즘 :
+-
+
+'''
+class Solution:
+    def countSubarrays(self, nums: List[int]) -> int:
+        n = len(nums)
+        ans = 0
+        for i in range(n-2):
+            if (nums[i] + nums[i+2]) * 2== nums[i+1]:
+                ans+=1
+        return ans