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package Sorts;
import java.util.Arrays;
import java.util.List;
 * The class contains util methods
 * @author Podshivalov Nikita (https://github.com/nikitap492)
final class SortUtils {
     * Helper method for swapping places in array
     * @param array The array which elements we want to swap
     * @param idx   index of the first element
     * @param idy   index of the second element
    static <T> boolean swap(T[] array, int idx, int idy) {
        T swap = array[idx];
        array[idx] = array[idy];
        array[idy] = swap;
        return true;
     * This method checks if first element is less then the other element
     * @param v first element
     * @param w second element
     * @return true if the first element is less then the second element
    static <T extends Comparable<T>> boolean less(T v, T w) {
        return v.compareTo(w) < 0;
     * Just print list
     * @param toPrint - a list which should be printed
    static void print(List<?> toPrint) {
        toPrint.stream()
                .map(Object::toString)
                .map(str -> str + " ")
                .forEach(System.out::print);
        System.out.println();
     * Prints an array
     * @param toPrint - the array  which should be printed
    static void print(Object[] toPrint) {
        System.out.println(Arrays.toString(toPrint));
     * Swaps all position from {@param left} to @{@param right} for {@param array}
     * @param array is an array
     * @param left  is a left flip border of the array
     * @param right is a right flip border of the array
    static <T extends Comparable<T>> void flip(T[] array, int left, int right) {
        while (left <= right) {
            swap(array, left++, right--);

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