From 3af36debbb68a8168e18af51468834385a7a0038 Mon Sep 17 00:00:00 2001 From: daimonbull Date: Fri, 28 Feb 2014 17:04:04 -0600 Subject: [PATCH 1/2] Update problem05.rb --- problem05.rb | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/problem05.rb b/problem05.rb index e69de29..6917ecd 100644 --- a/problem05.rb +++ b/problem05.rb @@ -0,0 +1,22 @@ +class Numeric + def divisible_to?(x) + self > 0 and x.downto(1).all? { |i| self % i == 0 } + end +end + +def divisible_to(x) + if x < 1 + return false + elsif x == 1 + return 1 + else + n = 0 + step = divisible_to(x-1) + until n.divisible_to? x + n += step + end + return n + end +end + +puts divisible_to(20) From 8b57734b9546bd607382b7511af2643b58354c98 Mon Sep 17 00:00:00 2001 From: daimonbull Date: Fri, 28 Feb 2014 17:19:44 -0600 Subject: [PATCH 2/2] Update problem08.rb --- problem08.rb | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/problem08.rb b/problem08.rb index e69de29..817c3cc 100644 --- a/problem08.rb +++ b/problem08.rb @@ -0,0 +1,36 @@ +number = "73167176531330624919225119674426574742355349194934 +96983520312774506326239578318016984801869478851843 +85861560789112949495459501737958331952853208805511 +12540698747158523863050715693290963295227443043557 +66896648950445244523161731856403098711121722383113 +62229893423380308135336276614282806444486645238749 +30358907296290491560440772390713810515859307960866 +70172427121883998797908792274921901699720888093776 +65727333001053367881220235421809751254540594752243 +52584907711670556013604839586446706324415722155397 +53697817977846174064955149290862569321978468622482 +83972241375657056057490261407972968652414535100474 +82166370484403199890008895243450658541227588666881 +16427171479924442928230863465674813919123162824586 +17866458359124566529476545682848912883142607690042 +24219022671055626321111109370544217506941658960408 +07198403850962455444362981230987879927244284909188 +84580156166097919133875499200524063689912560717606 +05886116467109405077541002256983155200055935729725 +71636269561882670428252483600823257530420752963450" + +def calculate_largest_product(number) + + number = number.split('') + product = 0 + + while number.size > 0 + new_product = number[0].to_i * number[1].to_i * number[2].to_i * number[3].to_i * number[4].to_i + product = new_product > product ? new_product : product + number.shift + end + + product +end + +puts calculate_largest_product(number) #=> 40824