124. Same Tree

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Input: p = [1,2,3], q = [1,2,3]

Output: true

Explanation: Both trees have the same structure and values.

Input: p = [1,2], q = [1,null,2]

Output: false

Explanation: The trees have different structures. 'p' has node 2 as the left child of 1, while 'q' has it as the right child of 1.

Input: p = [1,2,1], q = [1,1,2]

Output: false

Explanation: The trees have the same structure, but the node values are different. The left and right subtrees of the root have different values.

Time Complexity

O(n)

Space Complexity

O(h)