leetcode

leetcode 21(Merge Two Sorted Lists) - Java

leetcode 121 (Best Time to Buy and Sell Stock) - Java

leetcode 206(Reverse Linked List)

leetcode 993 (Cousins in Binary Tree) - Java

leetcode 104 (Maximum Depth of Binary Tree) - Java

leetcode 100 (Same Tree) - Java

leetcode 704(Binary Search) - java