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added 53 characters in body

edited Aug 27, 2019 at 14:16

edited Aug 27, 2019 at 14:16

Python 3, (削除) 40 (削除ここまで) 38 bytes

Thanks to squid for saving 2 bytes!

lambda n:n in[i*i for i in range(n+1)]

Too slow to return an answer for 2147483647 in a reasonable amount of time, but would work given sufficient time.

(This works in Python 2 also, but note that Python 2 will yield an OverflowError on very large inputs, due to range.)

answered Jun 8, 2017 at 14:07