Same Tree Java solution


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    /*

    same idea with 101: symmetric tree.

    */

    public class Solution {

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

    }


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