Arranging Coins 7. Valid Perfect Square 8. Sqrt (x) 9. Check If a Number Is Majority Element in a Sorted Array 10. Closest Binary Search Tree Value 11. Missing Number --- 🟨 Medium 12. Find Smallest ...
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Today I solved Problem 367 — Valid Perfect Square (Easy) on LeetCode. 🧩 The problem: Given a positive integer, determine if it is a perfect square — without using any built-in square root function.
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