[2016][ruby][9.1]

profile
Alpha Chen 8 years ago
parent 3cd8d40734
commit 5d8533ded8

@ -16,8 +16,26 @@ def decompress(input)
output
end
def decompressed_length(input)
length = 0
ss = StringScanner.new(input)
until ss.eos?
case
when ss.scan(/\((\d+)x(\d+)\)/)
times = ss[2].to_i
seq = ss.scan(/.{#{ss[1].to_i}}/)
length += times * decompressed_length(seq)
when ss.scan(/[^(]+/)
length += ss.matched.length
else
raise 'omg!'
end
end
length
end
if __FILE__ == $0
puts decompress(DATA.read.chomp).length
puts decompressed_length(DATA.read.chomp)
end
require 'minitest'
@ -32,6 +50,14 @@ class TestDecompress < Minitest::Test
assert_equal '(1x3)A', decompress('(6x1)(1x3)A')
assert_equal 'X(3x3)ABC(3x3)ABCY', decompress('X(8x2)(3x3)ABCY')
end
def test_decompressed_length
assert_equal 9, decompressed_length('(3x3)XYZ')
assert_equal 20, decompressed_length('X(8x2)(3x3)ABCY')
assert_equal 241920, decompressed_length('(27x12)(20x12)(13x14)(7x10)(1x12)A')
input = '(25x3)(3x3)ABC(2x3)XY(5x2)PQRSTX(18x9)(3x2)TWO(5x7)SEVEN'
assert_equal 445, decompressed_length(input)
end
end
__END__

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