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@ -155,8 +155,47 @@ namespace Euler { |
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return result; |
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} |
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[Fact] |
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static long Problem8() { |
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string number = |
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"73167176531330624919225119674426574742355349194934" + |
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"96983520312774506326239578318016984801869478851843" + |
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"85861560789112949495459501737958331952853208805511" + |
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"12540698747158523863050715693290963295227443043557" + |
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"66896648950445244523161731856403098711121722383113" + |
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"62229893423380308135336276614282806444486645238749" + |
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"30358907296290491560440772390713810515859307960866" + |
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"70172427121883998797908792274921901699720888093776" + |
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"65727333001053367881220235421809751254540594752243" + |
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"52584907711670556013604839586446706324415722155397" + |
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"53697817977846174064955149290862569321978468622482" + |
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"83972241375657056057490261407972968652414535100474" + |
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"82166370484403199890008895243450658541227588666881" + |
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"16427171479924442928230863465674813919123162824586" + |
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"17866458359124566529476545682848912883142607690042" + |
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"24219022671055626321111109370544217506941658960408" + |
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"07198403850962455444362981230987879927244284909188" + |
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"84580156166097919133875499200524063689912560717606" + |
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"05886116467109405077541002256983155200055935729725" + |
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"71636269561882670428252483600823257530420752963450"; |
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int numDigits = 13; |
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long maxProduct = 0; |
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for (int i = 0; i < number.Length - numDigits; i++) { |
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long product = 1; |
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for (int j = i; j < i + numDigits; j++) { |
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int digit = Int32.Parse(number.Substring(j, 1)); |
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product *= digit; |
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} |
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if (product > maxProduct) { |
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maxProduct = product; |
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} |
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} |
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Assert.Equal(23514624000, maxProduct); |
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return maxProduct; |
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} |
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static void Main(string[] args) { |
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WriteLine(Problem7()); |
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WriteLine(Problem8()); |
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} |
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} |
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} |