https://programmers.co.kr/learn/courses/30/lessons/42748 코딩테스트 연습 - K번째수 [1, 5, 2, 6, 3, 7, 4] [[2, 5, 3], [4, 4, 1], [1, 7, 3]] [5, 6, 3] programmers.co.kr package com.hyosung.algo; import java.util.Scanner; public class pro_sort02 { static int[] buff; static void swap(int[]a, int x, int y) { int temp = a[x]; a[x] = a[y]; a[y] = temp; } static void quickSort(int[] a, int left, int right) { int ..