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BTSymmetricTree.java
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40 lines (27 loc) · 947 Bytes
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package com.vinay.practice.lc;
// https://leetcode.com/problems/symmetric-tree/submissions/1158723844/
import java.util.LinkedList;
import java.util.Queue;
import com.vinay.practice.lc.BTLevelOrder.TreeNode;
public class BTSymmetricTree {
public boolean isSymmetric(TreeNode root) {
Queue<TreeNode> queue = new LinkedList<>();
queue.add(root.left);
queue.add(root.right);
while(!queue.isEmpty()){
TreeNode left = queue.poll();
TreeNode right = queue.poll();
if(left == null && right == null)
continue;
if(left == null || right == null)
return false;
if(left.val != right.val)
return false;
queue.add(left.left);
queue.add(right.right);
queue.add(left.right);
queue.add(right.left);
}
return true;
}
}