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SameTree.java

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/**

* Definition for binary tree

* public class TreeNode {

* int val;

* TreeNode left;

* TreeNode right;

* TreeNode(int x) { val = x; }

* }

*/

public class Solution {

public boolean isSameTree(TreeNode p, TreeNode q) {

// Start typing your Java solution below

// DO NOT write main() function

if(p==null && q==null)

return true;

else if(p==null || q==null)

return false;

return (p.val==q.val) && isSameTree(p.left,q.left) && isSameTree(p.right, q.right);

}

}