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61 lines (36 loc) · 766 Bytes
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26.java
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61 lines (36 loc) · 766 Bytes
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class Solution {
public boolean isSymmetric(TreeNode root) {
if(root==null)
{
return true;
}
if(root.left==null&&root.right==null)
{
return true;
}
if(root.left==null||root.right==null)
{
return false;
}
return find(root.left,root.right);
}
public boolean find(TreeNode p,TreeNode q)
{
if(p==null&&q==null)
{
return true;
}
if(p==null||q==null)
{
return false;
}
if(p.val==q.val)
{
return find(p.left,q.right)&&find(p.right,q.left);
}
else
{
return false;
}
}
}