Crystal 016

[FrankKair]

How the solution works

Straightforward solution, just convert number to big integer and sums its chars as integers.

def solve
  n = 2.to_big_i
  (n**1000).to_s.chars.reduce(0) { |sum, char| sum + char.to_i }
end

Performance

Crystal

Real time: 2.114 s
User time: 1.899 s
Sys. time: 0.448 s
CPU share: 111.04 %