• Home
• com.github.javadev
• leetcode-in-java17
• 1.20
• source code
• readme.md

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

g0801_0900.s0885_spiral_matrix_iii.readme.md Maven / Gradle / Ivy

885\. Spiral Matrix III

Medium

You start at the cell `(rStart, cStart)` of an `rows x cols` grid facing east. The northwest corner is at the first row and column in the grid, and the southeast corner is at the last row and column.

You will walk in a clockwise spiral shape to visit every position in this grid. Whenever you move outside the grid's boundary, we continue our walk outside the grid (but may return to the grid boundary later.). Eventually, we reach all `rows * cols` spaces of the grid.

Return _an array of coordinates representing the positions of the grid in the order you visited them_.

**Example 1:**

![](https://s3-lc-upload.s3.amazonaws.com/uploads/2018/08/24/example_1.png)

**Input:** rows = 1, cols = 4, rStart = 0, cStart = 0

**Output:** [[0,0],[0,1],[0,2],[0,3]] 

**Example 2:**

![](https://s3-lc-upload.s3.amazonaws.com/uploads/2018/08/24/example_2.png)

**Input:** rows = 5, cols = 6, rStart = 1, cStart = 4

**Output:** [[1,4],[1,5],[2,5],[2,4],[2,3],[1,3],[0,3],[0,4],[0,5],[3,5],[3,4],[3,3],[3,2],[2,2],[1,2],[0,2],[4,5],[4,4],[4,3],[4,2],[4,1],[3,1],[2,1],[1,1],[0,1],[4,0],[3,0],[2,0],[1,0],[0,0]] 

**Constraints:**

*   `1 <= rows, cols <= 100`
*   `0 <= rStart < rows`
*   `0 <= cStart < cols`