How to Solve Most Stones Removed with Same Row or Column Problem
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Most Stones Removed with Same Row or Column
On a 2D plane, we place n stones at some integer coordinate points. Each coordinate point may have at most one stone. A stone can be removed if it shares either the same row or the same column as anot...
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Understanding the Most Stones Removed with Same Row or Column Problem
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Problem Statement
On a 2D plane, we place n stones at some integer coordinate points. Each coordinate point may have at most one stone. A stone can be removed if it shares either the same row or the same column as another stone that has not been removed. Given an array stones of length n where stones[i] = [xi, yi] represents the location of the ith stone, return the largest possible number of stones that can be removed.
Most Stones Removed with Same Row or Column
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Examples
stones = [[0,0],[0,1],[1,0],[1,2],[2,1],[2,2]]5One way to remove 5 stones is as follows: 1. Remove stone [2,2] because it shares the same row as [2,1]. 2. Remove stone [2,1] because it shares the same column as [0,1]. 3. Remove stone [1,2] because it shares the same row as [1,0]. 4. Remove stone [1,0] because it shares the same column as [0,0]. 5. Remove stone [0,1] because it shares the same row as [0,0]. Stone [0,0] cannot be removed since it does not share a row/column with another stone still on the plane.
stones = [[0,0],[0,2],[1,1],[2,0],[2,2]]3One way to make 3 moves is as follows: 1. Remove stone [2,2] because it shares the same row as [2,0]. 2. Remove stone [2,0] because it shares the same column as [0,0]. 3. Remove stone [0,2] because it shares the same row as [0,0]. Stones [0,0] and [1,1] cannot be removed since they do not share a row/column with another stone still on the plane.
stones = [[0,0]]0[0,0] is the only stone on the plane, so you cannot remove it.
Constraints
1 <= stones.length <= 10000 <= xi, yi <= 104No two stones are at the same coordinate point.How Interview Coder Helps with Leetcode Problems
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