Problem 2325. GJam 2014 Rd 1c: Reordering Train Cars (Large)

Created by Richard Zapor

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This Challenge is derived from <a href = "http://code.google.com/codejam/contest/3004486/dashboard#s=p1">GJam 2014 Rd 1c: Reordering Train Cars (Large)</a>.Determine number of sequences for set of strings under the constraint that all same characters must be contiguous. The large case could have 26! or more permutations.Input: s, string of N space separated string segments of letters [a..z]. 1&lt;=N&lt;=100. Total letters &lt;=100.Output: val, number of possible sequences, modulo 1,000,000,007Example: Small Train Case examples<pre class="language-matlab">ab bbbc cd Val=1 as only abbbbccd can be created
aa aa bc c Val=4 aa gives 2 positions, aa'aa''bcc,aa''aa'bcc, bcccaa'aa'',bcccaa''aa'
abc bcd Val=0 as c is internal and thus can not connect to c of abc
</pre>Theory: <a href = "http://www.mathworks.com/matlabcentral/cody/problems/2324-gjam-2014-rd-1c-train-cars">Train Small Spoilers</a>Large Case specific info. See <a href = "http://www.mathworks.com/matlabcentral/cody/problems/1833-usage-of-java-math-add-multiply-pow">Usage of java math</a> for unlimited precision. Note intValue gives more precision than floatValue. No java factorial exists so a function, non-recursive, is suggested. The small solution can be converted via java BigInteger factorial, mod, multiply, and intValue to solve the large case.Additional GJam solutions can be found at <a href = "http://go-hero.net/jam">Example GJam Matlab solutions</a>. Select Find Solutions, change Language to Matlab. The Test Suite, at the bottom, contains a full GJam Small Matlab solution. No Valid Matlab solutions were submitted during the contest.

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Last Solution submitted on Dec 15, 2018

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mmmriva on 21 May 2014

Can you please check the test suite as test 30 is uncomplete ? Thanks.

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2014 biginteger factorial gjam intval java permutations

Problem 2325. GJam 2014 Rd 1c: Reordering Train Cars (Large)

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Problem 2325. GJam 2014 Rd 1c: Reordering Train Cars (Large)

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