15 lines
389 B
JavaScript
15 lines
389 B
JavaScript
function lcs(a, b) {
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var aSub = a.substr(0, a.length - 1);
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var bSub = b.substr(0, b.length - 1);
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if (a.length === 0 || b.length === 0) {
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return '';
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} else if (a.charAt(a.length - 1) === b.charAt(b.length - 1)) {
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return lcs(aSub, bSub) + a.charAt(a.length - 1);
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} else {
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var x = lcs(a, bSub);
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var y = lcs(aSub, b);
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return (x.length > y.length) ? x : y;
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}
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}
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