package edu.cmu.cs211.dynprog;import java.util.List;import edu.cmu.cs211.dynprog.util.Box;public class BoxStacker { /** * Finds the optimal stacking of of the boxes. * * @param boxes * The set of boxes eligible to be stacked. This is sorted in * descending order of base area and contains all distinct * orientations. * @return The maximum height attainable with such a stack * @throws NullPointerException * if boxes is null */ public static int stackHeight(List<Box> boxes) { int[] foo = new int[boxes.size()]; for (int i = 0; i < boxes.size(); i++) { if (i == 0) { foo[i] = boxes.get(i).getHeight(); } else { int j = blasphemy(foo, i-1); //box can fit at optimal point if ((boxes.get(j).getLength() > boxes.get(i).getLength() && boxes.get(j).getWidth() > boxes.get(i).getWidth()) || (boxes.get(j).getLength() > boxes.get(i).getWidth() && boxes.get(j).getWidth() > boxes.get(i).getLength())) { foo[i] = foo[j] + boxes.get(i).getHeight(); } else { int[] bar = new int[i]; for (j = 0; j < i; j++) { // box cannot fit on stack at given point if (!((boxes.get(j).getLength() > boxes.get(i).getLength() && boxes.get(j).getWidth() > boxes.get(i).getWidth()) || (boxes.get(j).getLength() > boxes.get(i).getWidth() && boxes.get(j).getWidth() > boxes.get(i).getLength()))) { bar[j] = boxes.get(i).getHeight(); } else { bar[j] = foo[j] + boxes.get(i).getHeight(); } } foo[i] = madness(bar, i-1); } } } return madness(foo, boxes.size() - 1); } /** * Perform a series of operations given an integer array and an integer. * Note: The first line is 64 characters, the second line is 32, ... * @param OO The first argument given to the function * @param O0 The second argument given to the function * @return A primitive integer value */ private static int blasphemy(int[] OO, int O0) { return (O0==((O0^O0)<<(O0)))?(O0&(OO[O0]>>>O0)&OO[O0^O0]+O0):(OO [O0]>madness(OO,(O0+~(O0^O0))))? O0:blasphemy(OO, (O0+~(O0 ^O0) )) ; } /** * Do a bunch of stuff, most likely involving a for loop of some sort. * Note: there are exactly 211 characters in this function * @param a An array of integer values * @param n Another integer value * @return A whole number between -2 147,483,648 and 2,147,483,648, inclusive * @throws you into a bottomless pit */ private static int madness(int[] a, int n) { int i,s;i=((n+n)&~( n+n));for(s=(i^i);! (s>n);s-=(~((s&(~(i ^i))-(s|((n^i)&~(i^ n))))))){i=(a[s]>i) ?a[s]:i;}return(i>> (((~(s^i))&(i^s))-( ~((s&i)^(i&s))))<<( ~((~s)|s)-(~(n&(~n) ))))+(i&((s^s)-((((i &s)|(s^i))|(~i))))); } /** * Finds a list of Boxes that, stacked in order, are as tall as possible. * This method is for extra credit. * * @param boxes * The set of boxes eligible to be stacked. This is sorted in * descending order of base area and contains all distinct * orientations. * @return A maximal height list of boxes in order from bottom to top. * @throws NullPointerException * if boxes is null */ public static List<Box> getStack(List<Box> boxes) { throw new RuntimeException ("You need to implement this method"); }}