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Diffstat (limited to 'problems/13-Mod-3/a.rb')
| -rw-r--r-- | problems/13-Mod-3/a.rb | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/problems/13-Mod-3/a.rb b/problems/13-Mod-3/a.rb new file mode 100644 index 0000000..b0e909b --- /dev/null +++ b/problems/13-Mod-3/a.rb @@ -0,0 +1,56 @@ +def f1(n) + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + ((n >> 4) & 0b11) + + ((n >> 6) & 0b11) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + ((n >> 4) & 0b11) + + ((n >> 6) & 0b11) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + ((n >> 4) & 0b11) + + ((n >> 6) & 0b11) + + 0 + n == 3 ? 0 : n +end + +def f2(n) + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + ((n >> 4) & 0b11) + + ((n >> 6) & 0b11) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + 0 + n == 3 ? 0 : n +end + +def f3(n) + n = ((n >> 0) & 0b1111) + + ((n >> 4) & 0b1111) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + ((n >> 4) & 0b11) + + 0 + n = ((n >> 0) & 0b11) + + ((n >> 2) & 0b11) + + 0 + n == 3 ? 0 : n +end + +256.times do |n| + expected = n % 3 + actual = f3(n) + + if actual != expected + puts "#{actual} != #{expected} (#{n}; #{"%08b" % n})" + end +end |