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style: enable HideUtilityClassConstructor
in checkstyle (#5147)
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@ -7,7 +7,9 @@ import java.util.TreeSet;
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* Finds all permutations of 1...n of length k
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* @author TheClerici (<a href="https://github.com/TheClerici">git-TheClerici</a>)
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*/
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public class ArrayCombination {
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public final class ArrayCombination {
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private ArrayCombination() {
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}
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private static int length;
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/**
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