challenge-105/abigail/lua/ch-1.lua


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#!/opt/local/bin/lua

--
-- See ../README.md
--

--
-- Run as: lua ch-1.lua < input-file
--
-- Input will consist of lines; each line will have two numbers, N and k, N > 0,
-- k > 0. For each line of input, we output a line with the Nth root of k.
--
-- We're not doing any input validations; we're assuming it's correct.
--

--
-- To find the Nth root of a number k, we just raise k to the power 1/N
--

for line in io . lines () do
    _, _, N, k = line : find ("(%S+)%s+(%S+)")
    print (k ^ (1 / N))
end