Is this tree symmetric? (Symmetric tree problem - LeetCode .101) - Inside code

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insidecode
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thank you, your tutorials really helped me to grow up my skills in algorithms and data structures.
we need tutorials about regular expression and how it works inside and how to find its time complexity

brm
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Great explanation and solution! I finally understood how to solve this problem. MASSIVE thanks!

ruslanyermakov
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The first thing that came to my mind was BFS. But the solution you proposed was hell creative! Amazing!

asatyammis