A perfect number occurs whent the sum of all divisors of a positive integer, except the number itself, equals the number.
28 = 1 + 2 + 4 + 7 + 14;
so return true
10 ~= 1 + 2 + 5
so return false
Reverse the vector
Back to basics 15 - Benchmark
Scoring for oriented dominoes
07 - Common functions and indexing 1
Side of an equilateral triangle
Project Euler: Problem 14 Longest Collatz sequence(harder version)
Compute the intersect point of line and plan
Put m balls into n boxes (again)
Return fibonacci sequence do not use loop and condition version 3
Generate a vector like 1,2,2,3,3,3,4,4,4,4
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