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pawelniewie/valid_pesel.rb

Created March 13, 2017 19:48
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Simple PESEL validator
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valid_pesel.rb
def valid_pesel?(pesel)
false if pesel.size != 11
(a, b, c, d, e, f, g, h, i, j, k) = pesel.chars.map(&:to_i)
checksum = a + 3*b + 7*c + 9*d + e + 3*f + 7*g + 9*h + i + 3*j + k
checksum % 10 == 0
end
no = gets.to_i
no.times do
pesel = gets
puts valid_pesel?(pesel) ? 'Y' : 'N'
end
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