You will be given a big integer, you should return the square root of it.
Math with Roman Numerals
Project Euler: Problem 2, Sum of even Fibonacci
USC Fall 2012 ACM : Code Word Minimum Flipped Bits
Determine if input is a Narcissistic number
Find the regional maximum value
Compute the intersect point of line and plan
Determine if input is a perfect number
If the number is Narcissistic number
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