Integer Coords
Tree Coloring
Codeforces Round 117 (Div. 2) E. Wooden Fence
Codeforces Round 118 (Div. 1) B. Mushroom Scientists
Codeforces Round 119 (Div. 1) B. AlgoRace
H. Stack
Codeforces Round 120 (Div. 2) B. Surrounded
530. Minimum Absolute Difference in BST
Given the root of a Binary Search Tree (BST), return the minimum absolute difference between the values of any two different nodes in the tree.
root
Max Wave Array
Max Or Subarray