判断变量n是否是完全平方数？

状态	递交者	时间	内存	语言	代码	递交时间
AC	13605237228	7ms	504 KiB	C++14	178 Bytes	2023-7-28 10:49:26
AC	17265191909	7ms	408 KiB	C++14	193 Bytes	2023-7-9 9:46:14
AC	13803744281	7ms	432 KiB	C++14	199 Bytes	2023-7-16 14:11:44
AC	15805286761	7ms	376 KiB	C++14	162 Bytes	2024-1-31 15:30:23
AC	yangxiaoyv	7ms	376 KiB	C++14	167 Bytes	2023-8-1 14:00:32
AC	13355623558	7ms	392 KiB	C++14	180 Bytes	2023-7-29 18:11:18
AC	13482763234	7ms	396 KiB	C++14	184 Bytes	2023-7-6 11:26:04
AC	13803744281	7ms	504 KiB	C++14	199 Bytes	2023-7-14 20:23:41
AC	13355623558	9ms	432 KiB	C++14	180 Bytes	2023-7-31 11:59:21
AC	13466648036	10ms	404 KiB	C++14	188 Bytes	2023-7-29 20:57:33
AC	admin	21ms	384 KiB	C++14	169 Bytes	2023-5-17 1:11:52