为有牺牲多壮志,敢教日月换新天。

[Swift]LeetCode1314. 矩阵区域和 | Matrix Block Sum

★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
➤微信公众号:山青咏芝(let_us_code)
➤博主域名:https://www.zengqiang.org
➤GitHub地址:https://github.com/strengthen/LeetCode
➤原文地址: https://www.cnblogs.com/strengthen/p/12185567.html
➤如果链接不是山青咏芝的博客园地址,则可能是爬取作者的文章。
➤原文已修改更新!强烈建议点击原文地址阅读!支持作者!支持原创!
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★

热烈欢迎,请直接点击!!!

进入博主App Store主页,下载使用各个作品!!!

注:博主将坚持每月上线一个新app!!!

Given a m * n matrix mat and an integer K, return a matrix answer where each answer[i][j] is the sum of all elements mat[r][c] for i - K <= r <= i + K, j - K <= c <= j + K, and (r, c) is a valid position in the matrix.
 

Example 1:

Input: mat = [[1,2,3],[4,5,6],[7,8,9]], K = 1
Output: [[12,21,16],[27,45,33],[24,39,28]]
Example 2:

Input: mat = [[1,2,3],[4,5,6],[7,8,9]], K = 2
Output: [[45,45,45],[45,45,45],[45,45,45]]
 

Constraints:

m == mat.length
n == mat[i].length
1 <= m, n, K <= 100
1 <= mat[i][j] <= 100


给你一个 m * n 的矩阵 mat 和一个整数 K ,请你返回一个矩阵 answer ,其中每个 answer[i][j] 是所有满足下述条件的元素 mat[r][c] 的和: 

i - K <= r <= i + K, j - K <= c <= j + K 
(r, c) 在矩阵内。
 

示例 1:

输入:mat = [[1,2,3],[4,5,6],[7,8,9]], K = 1
输出:[[12,21,16],[27,45,33],[24,39,28]]
示例 2:

输入:mat = [[1,2,3],[4,5,6],[7,8,9]], K = 2
输出:[[45,45,45],[45,45,45],[45,45,45]]
 

提示:

m == mat.length
n == mat[i].length
1 <= m, n, K <= 100
1 <= mat[i][j] <= 100

posted @ 2020-01-13 08:36  为敢技术  阅读(355)  评论(0编辑  收藏  举报