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packrec.java
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packrec.java
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/*
ID: ...
LANG: JAVA
TASK: packrec
*/
import java.io.*;
import java.util.*;
class packrec {
public class Rect {
public int width;
public int height;
public Rect(int w, int h) {
this.height = h;
this.width = w;
}
public void rotate() {
int x = this.height;
this.height = this.width;
this.width = x;
}
}
public Rect[] r = new Rect[4];
public int min = Integer.MAX_VALUE;
public boolean[] sides = new boolean[201];
public void checkRect(Rect b) {
if (b.width * b.height < min) {
min = b.width * b.height;
Arrays.fill(sides, false);
}
if (b.width * b.height == min) {
sides[Math.min(b.width, b.height)] = true;
}
}
public void check(){
Rect b1 = new Rect(0, 0);
for (int i=0;i<4;i++){
b1.width += r[i].width;
b1.height = Math.max(b1.height, r[i].height);
}
checkRect(b1);
b1.width = 0;
b1.height = 0;
for (int i=0; i<3; i++) {
b1.width += r[i].width;
b1.height = Math.max(b1.height, r[i].height);
}
b1.height += r[3].height;
b1.width = Math.max(b1.width, r[3].width);
checkRect(b1);
b1.width = 0;
b1.height = 0;
for (int i=0; i<2; i++) {
b1.width += r[i].width;
b1.height = Math.max(b1.height, r[i].height);
}
b1.height += r[2].height;
b1.width = Math.max(b1.width, r[2].width);
b1.height = Math.max(b1.height, r[3].height);
b1.width += r[3].width;
checkRect(b1);
b1.width = 0;
b1.height = 0;
for (int i=0; i<2; i++) {
b1.width += r[i].width;
b1.height = Math.max(b1.height, r[i].height);
}
b1.height = Math.max(b1.height, r[2].height + r[3].height) ;
b1.width += Math.max(r[3].width, r[2].width);
checkRect(b1);
b1.height = Math.max(r[0].height+r[2].height, r[1].height+r[3].height);
b1.width = r[0].width + r[1].width;
/* do 2 and 1 touch? */
if(r[0].height < r[1].height)
b1.width = Math.max(b1.width, r[2].width+r[1].width);
/* do 2 and 3 touch? */
if(r[0].height+r[2].height > r[1].height)
b1.width = Math.max(b1.width, r[2].width+r[3].width);
/* do 0 and 3 touch? */
if(r[1].height < r[0].height)
b1.width = Math.max(b1.width, r[0].width+r[3].width);
/* maybe 2 or 3 sits by itself */
b1.width = Math.max(b1.width, r[2].width);
b1.width = Math.max(b1.width, r[3].width);
checkRect(b1);
}
public void rotate(int n) {
if (n == 4) {
check();
}
else {
rotate(n+1);
r[n].rotate();
rotate(n+1);
r[n].rotate();}
}
public void permute(int n){
if (n == 4) {
rotate(0);
}
for (int i=n;i<4;i++){
Rect t;
t = r[n];
r[n] = r[i];
r[i] = t;
permute(n+1);
t = r[n];
r[n] = r[i];
r[i] = t;
}
}
public static void main (String [] args) throws IOException {
// Use BufferedReader rather than RandomAccessFile; it's much faster
//BufferedReader f = new BufferedReader(new FileReader("J:\\problems\\UsacoJava\\src\\milk2.in"));
BufferedReader f = new BufferedReader(new FileReader("packrec.in"));
// input file name goes above
//PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("J:\\problems\\UsacoJava\\src\\milk2.out")));
PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("packrec.out")));
// Use StringTokenizer vs. readLine/split -- lots faster
packrec p = new packrec();
for (int i =0;i<4;i++){
StringTokenizer st = new StringTokenizer(f.readLine());
int w = Integer.parseInt(st.nextToken()); // first integer;
int h = Integer.parseInt(st.nextToken()); // first integer;
p.r[i] = p.new Rect(w, h);
}
p.permute(0);
out.println(p.min); // output result
for (int i=1;i<201;i++){
if (p.sides[i]){
out.println(i + " " + (p.min / i));
}
}
out.close(); // close the output file
System.exit(0); // don't omit this!
}
}