The letter i is technically a complex number. So it should return true.
Rafael, the question askes for an integer specifically and not a number (let alone a complex number).
Number of 1s in a binary string
find the maximum element of the matrix
2倍してみよう - ここからスタート！
Determine the length of a string of characters
Create a "+" flag
Cross ("+") flag returns
Create the flag of Ramumbia
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