FilesExpand file tree

 master

/

NC80.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

47 lines (41 loc) · 1.13 KB

 master

/

NC80.java

Copy path

Top

File metadata and controls

• Code
• Blame

47 lines (41 loc) · 1.13 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

package com.todd.nowcoder;

import java.util.ArrayList;

import java.util.LinkedList;

/**

* @author todd

* @date 2020/9/9 20:39

* @description: TODO

*/

public class NC80 {

public class TreeNode {

int val = 0;

TreeNode left = null;

TreeNode right = null;

public TreeNode(int val) {

this.val = val;

}

}

ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {

if (pRoot == null) {

return new ArrayList<>();

}

ArrayList<ArrayList<Integer>> ans = new ArrayList<>();

LinkedList<TreeNode> queue = new LinkedList<>();

queue.add(pRoot);

while (!queue.isEmpty()) {

ArrayList<Integer> level = new ArrayList<>();

for (int i = queue.size(); i > 0; i--) {

TreeNode cur = queue.poll();

level.add(cur.val);

if (cur.left != null) {

queue.add(cur.left);

}

if (cur.right != null) {

queue.add(cur.right);

}

}

ans.add(level);

}

return ans;

}

}