Perfect pyramids X64258


Statement
 

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Input

The input will be a single line containing a positive number greater or equal than 1.

Output

The output will print "True" if the input is the number of dots of the side of a perfect pyramid, or "False" otherwise.

Public test cases

  • Input

    6

    Output

    True

  • Input

    5706588888630

    Output

    True

  • Input

    5706588888631

    Output

    False
    • Information
    Author
    HP CodeWars
    Language
    English
    Official solutions
    Python
    User solutions
    C++ Haskell Java Python