Narcissistic number is a number that is the sum of its own digits each raised to the power of the number of digits.
153 = 1^3 + 5^3 + 3^3
101 ~= 1^3 + 0 ^3 + 1^3
Determine Whether an array is empty
Getting the indices from a vector
Length of a short side
Area of an Isoceles Triangle
Big Integer Sqrt
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Put m balls into n boxes
Find the maximum two numbers of every column of a matrix
Put m balls into n boxes (again)
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