import java.util.*; public class MainC {     public static void swap(int[] tower, int i, int j){         int tem = tower[i];         tower[i] = tower[j];         tower[j] = tem;     } // 对tower调整，保证有序，复杂度O(k)     public static void helper(int[] tower){         for(int i = 0; tower[i] > ...