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Copy pathsolution32_2.java
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37 lines (33 loc) · 999 Bytes
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package nowcoder;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.Queue;
public class solution32_2 {
ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {
Queue<TreeNode> queue = new LinkedList<>();
ArrayList<ArrayList<Integer>> ret = new ArrayList<>();
((LinkedList<TreeNode>) queue).add(pRoot);
while(!queue.isEmpty())
{
ArrayList<Integer> list = new ArrayList<>();
int cnt = queue.size();
while(cnt-->0)
{
TreeNode t = queue.poll();
if(t == null)
{
continue;
}
list.add(t.val);
((LinkedList<TreeNode>) queue).add(t.left);
((LinkedList<TreeNode>) queue).add(t.right);
}
if (list.size()!=0)
{
ret.add(list);
}
}
return ret;
}
}