You will be given a big integer, you should return the square root of it.
Get the area codes from a list of phone numbers
Project Euler: Problem 1, Multiples of 3 and 5
Find Rotated Substring
Sum the Digits of a Number
Project Euler: Problem 14 Longest Collatz sequence(harder version)
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Find the maximum two numbers of every column of a matrix
Return fibonacci sequence do not use loop and condition
Return fibonacci sequence do not use loop and condition version 3
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