chore(i8n,learn): processed translations

curriculum/challenges/espanol/10-coding-interview-prep/rosetta-code/longest-common-subsequence.md

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+---
+id: 5e6dd1278e6ca105cde40ea9
+title: Longest common subsequence
+challengeType: 5
+forumTopicId: 385271
+dashedName: longest-common-subsequence
+---
+
+# --description--
+
+The **longest common subsequence** (or [**LCS**](http://en.wikipedia.org/wiki/Longest_common_subsequence_problem)) of groups A and B is the longest group of elements from A and B that are common between the two groups and in the same order in each group. For example, the sequences "1234" and "1224533324" have an LCS of "1234":
+
+***1234***
+
+***12***245***3***332***4***
+
+For a string example, consider the sequences "thisisatest" and "testing123testing". An LCS would be "tsitest":
+
+***t***hi***si***sa***test***
+
+***t***e***s***t***i***ng123***test***ing.
+
+Your code only needs to deal with strings.
+
+For more information on this problem please see [Wikipedia](https://en.wikipedia.org/wiki/Longest_common_subsequence_problem).
+
+# --instructions--
+
+Write a case-sensitive function that returns the LCS of two strings. You don't need to show multiple LCS's.
+
+# --hints--
+
+`lcs` should be a function.
+
+```js
+assert(typeof lcs == 'function');
+```
+
+`lcs("thisisatest", "testing123testing")` should return a string.
+
+```js
+assert(typeof lcs('thisisatest', 'testing123testing') == 'string');
+```
+
+`lcs("thisisatest", "testing123testing")` should return `"tsitest"`.
+
+```js
+assert.equal(lcs('thisisatest', 'testing123testing'), 'tsitest');
+```
+
+`lcs("ABCDGH", "AEDFHR")` should return `"ADH"`.
+
+```js
+assert.equal(lcs('ABCDGH', 'AEDFHR'), 'ADH');
+```
+
+`lcs("AGGTAB", "GXTXAYB")` should return `"GTAB"`.
+
+```js
+assert.equal(lcs('AGGTAB', 'GXTXAYB'), 'GTAB');
+```
+
+`lcs("BDACDB", "BDCB")` should return `"BDCB"`.
+
+```js
+assert.equal(lcs('BDACDB', 'BDCB'), 'BDCB');
+```
+
+`lcs("ABAZDC", "BACBAD")` should return `"ABAD"`.
+
+```js
+assert.equal(lcs('ABAZDC', 'BACBAD'), 'ABAD');
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function lcs(a, b) {
+
+}
+```
+
+# --solutions--
+
+```js
+function lcs(a, b) {
+  var aSub = a.substr(0, a.length - 1);
+  var bSub = b.substr(0, b.length - 1);
+
+  if (a.length === 0 || b.length === 0) {
+    return '';
+  } else if (a.charAt(a.length - 1) === b.charAt(b.length - 1)) {
+    return lcs(aSub, bSub) + a.charAt(a.length - 1);
+  } else {
+    var x = lcs(a, bSub);
+    var y = lcs(aSub, b);
+    return (x.length > y.length) ? x : y;
+  }
+}
+```