Search⌘ K
AI Features

Solution: Most Stones Removed with Same Row or Column

Explore how to optimize stone removal from a grid using the Union Find pattern. Learn to group stones sharing the same row or column and calculate the maximum stones removable by identifying connected components and applying union and find methods effectively.

Statement

Given an array of nn stones in a two-dimensional plane, where each stone is represented by a pair of x and y coordinates, find the maximum number of stones we can remove with the following condition:

A stone can be removed if it shares either the same row or the same column with another stone that has not been removed so far.

Stones are provided as an array, stones, of length nn, where stones[i]=[xi,yi]stones[i] = [x_i, y_i] ...