KD Tree
K-d tree is a binary search tree with more than 1 dimensions (i.e k dimensions).
K-d tree is a binary search tree with more than 1 dimensions (i.e k dimensions).
Knapsack Problem: Given total capacity [totalCapacity] of a bag,
Given a target T and a set of points S, find the nearest neighbour of T in S.
https://algs4.cs.princeton.edu/92search/QuadTree.java.html