public class Solution {
public boolean
isSameTree(TreeNode p, TreeNode q) {
if(p==
null && q==
null) {
return true;
}
else if(p !=
null && q==
null || p==
null && q!=
null) {
return false;
}
else if(p.val != q.val) {
return false;
}
else {
return isSameTree(p.left,q.left) && isSameTree(p.right,q.right);
}
}
}
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