38 lines
802 B
Ruby
38 lines
802 B
Ruby
#!/usr/bin/env ruby
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def generate(value, factor)
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(value * factor) % 2147483647
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end
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line_1, line_2 = STDIN.read.chomp.split("\n").to_a
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generator_a_start = line_1.gsub("Generator A starts with ", "").to_i
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generator_b_start = line_2.gsub("Generator B starts with ", "").to_i
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a_factor = 16807
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b_factor = 48271
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a = generator_a_start
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b = generator_b_start
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pairs = 0
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40000000.times do
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a = generate(a, a_factor)
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b = generate(b, b_factor)
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pairs += 1 if (a & 65535 == b & 65535)
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end
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puts "Part 1: #{pairs}"
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a = generator_a_start
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b = generator_b_start
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pairs = 0
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5000000.times do
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a = generate(a, a_factor)
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a = generate(a, a_factor) until (a % 4) == 0
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b = generate(b, b_factor)
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b = generate(b, b_factor) until (b % 8) == 0
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pairs += 1 if (a & 65535 == b & 65535)
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end
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puts "Part 2: #{pairs}" |