# ---
# title: 100. Same Tree
# id: problem100
# author: Tian Jun
# date: 2020-10-31
# difficulty: Easy
# categories: Tree, Depth-first Search
# link: <https://leetcode.com/problems/same-tree/description/>
# hidden: true
# ---
# 
# Given two binary trees, write a function to check if they are the same or not.
# 
# Two binary trees are considered the same if they are structurally identical
# and the nodes have the same value.
# 
# **Example 1:**
# 
#     
#     
#     Input:     1         1
#               / \       / \
#              2   3     2   3
#     
#             [1,2,3],   [1,2,3]
#     
#     Output: true
#     
# 
# **Example 2:**
# 
#     
#     
#     Input:     1         1
#               /           \
#              2             2
#     
#             [1,2],     [1,null,2]
#     
#     Output: false
#     
# 
# **Example 3:**
# 
#     
#     
#     Input:     1         1
#               / \       / \
#              2   1     1   2
#     
#             [1,2,1],   [1,1,2]
#     
#     Output: false
#     
# 
# 
## @lc code=start
using LeetCode

## add your code here:
## @lc code=end
