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author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
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committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/benchmark/bm_so_fannkuch.rb |
Fresh start
Diffstat (limited to 'jni/ruby/benchmark/bm_so_fannkuch.rb')
-rw-r--r-- | jni/ruby/benchmark/bm_so_fannkuch.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/jni/ruby/benchmark/bm_so_fannkuch.rb b/jni/ruby/benchmark/bm_so_fannkuch.rb new file mode 100644 index 0000000..bac5ecd --- /dev/null +++ b/jni/ruby/benchmark/bm_so_fannkuch.rb @@ -0,0 +1,45 @@ +# The Computer Language Shootout +# http://shootout.alioth.debian.org/ +# Contributed by Sokolov Yura +# Modified by Ryan Williams + +def fannkuch(n) + maxFlips, m, r, check = 0, n-1, n, 0 + count = (1..n).to_a + perm = (1..n).to_a + + while true + if check < 30 + puts "#{perm}" + check += 1 + end + + while r != 1 + count[r-1] = r + r -= 1 + end + + if perm[0] != 1 and perm[m] != n + perml = perm.clone #.dup + flips = 0 + while (k = perml.first ) != 1 + perml = perml.slice!(0, k).reverse + perml + flips += 1 + end + maxFlips = flips if flips > maxFlips + end + while true + if r==n then return maxFlips end + perm.insert r,perm.shift + break if (count[r] -= 1) > 0 + r += 1 + end + end +end + +def puts *args +end + +N = 9 # (ARGV[0] || 1).to_i +puts "Pfannkuchen(#{N}) = #{fannkuch(N)}" + |