LeetCode_二分搜索_简单_367.有效的完全平方数

星许辰发布时间：2022-08-02 09:54:50 ，浏览量：0

1.题目
2.思路
3.代码实现（Java）

1.题目

给定一个正整数 num ，编写一个函数，如果 num 是一个完全平方数，则返回 true ，否则返回 false 。

进阶：不要使用任何内置的库函数，如 sqrt 。

示例 1：输入：num = 16 输出：true

示例 2：输入：num = 14 输出：false

提示： 1

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