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Copy pathTrain.java
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77 lines (62 loc) · 1.7 KB
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package huaweiOJ;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;
public class Train {
public static void main(String[] args) {
int[] data = new int[] { 1, 2, 3 };
// printAll(data);
// getStr(data, lists);
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
LinkedList<LinkedList<Integer>> lists = new LinkedList<LinkedList<Integer>>();
int size = sc.nextInt();
int[] id = new int[size];
for (int i = 0; i < size; ++i) {
id[i] = sc.nextInt();
}
Arrays.sort(id);
getStr(id, lists);
for (LinkedList<Integer> item : lists) {
String result = "";
for (int i : item) {
result += i + " ";
}
System.out.println(result.trim());
}
// System.out.println(lists.size());
}
}
public static void printAll(int[] data) {
for (int i = 0; i < data.length - 1; i++) {
for (int j = i + 1; j < data.length; j++) {
int[] tmp = Arrays.copyOf(data, data.length);
int cur = tmp[i];
tmp[i] = tmp[j];
tmp[j] = cur;
System.out.println(Arrays.toString(tmp));
}
}
}
public static void getStr(int[] data, LinkedList<LinkedList<Integer>> list) {
if (data.length == 1) {
LinkedList<Integer> listItem = new LinkedList<Integer>();
listItem.add(data[0]);
list.add(listItem);
return;
}
int cur = data[0];
int[] sub = Arrays.copyOfRange(data, 1, data.length);
getStr(sub, list);
int curSize = list.size();
for (int i = 0; i < curSize; i++) {
LinkedList<Integer> listItem = list.get(i);
for (int j = 1; j <= listItem.size(); j++) {
LinkedList<Integer> newItem = new LinkedList<Integer>(listItem);
newItem.add(j, cur);
list.add(newItem);
}
listItem.addFirst(cur);
}
}
}