List methods are convenient for these types of manipulations, but a side-effect of my algorithm is a duplicate entry when a whole-number square root pops up.

List方法对于这些类型操作很方便，但我的算法有个副作用，就是出现整数平方根时，会有重复。

youdao

How to check if there is initial value and duplicate entry?

如何检查是否有初始值和重复的条目？

youdao