descr=%{
    The series, 1^1 + 2^2 + 3^3 + ... + 10^10 = 10405071317.

    Find the last ten digits of the series, 1^1 + 2^2 + 3^3 + ... + 1000^1000.
}

sum=0
(1..1000).each do |n|
    sum += n**n
end

puts sum.to_s[-10..-1]