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#!/usr/bin/env ruby
input = $stdin.readlines[0].strip.to_i
scores = [3, 7]
elf1 = 0
elf2 = 1
loop do
se1 = scores[elf1]
se2 = scores[elf2]
sum = se1 + se2
scores += sum.to_s.chars.map(&:to_i)
slen = scores.length
elf1 = (elf1 + 1 + se1) % slen
elf2 = (elf2 + 1 + se2) % slen
break if slen > (input + 10)
end
puts scores[input...(input+10)].join
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