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By Javier Feliu Coding Challenges, Easy

Best Time to Buy and Sell Stock (LeetCode #121)

By Javier Feliu Coding Challenges, Easy

Maximum Depth of Binary Tree (LeetCode #104)

By Javier Feliu Coding Challenges, Easy

Same Tree (LeetCode #100)

By Javier Feliu Coding Challenges, Easy

Climbing Stairs (LeetCode #70)

By Javier Feliu Coding Challenges, Easy

Plus One (LeetCode #66)

By Javier Feliu Coding Challenges, Easy

Maximum Subarray (LeetCode #53)

By Javier Feliu Coding Challenges, Easy

Merge Two Sorted Lists (LeetCode #21)

By Javier Feliu Coding Challenges, Easy

Valid Parentheses (LeetCode #20)