Package g2501_2600.s2536_increment_submatrices_by_one

Class Solution

java.lang.Object

g2501_2600.s2536_increment_submatrices_by_one.Solution

public class Solution
extends java.lang.Object

2536 - Increment Submatrices by One.

Medium

You are given a positive integer n, indicating that we initially have an n x n 0-indexed integer matrix mat filled with zeroes.

You are also given a 2D integer array query. For each query[i] = [row1i, col1i, row2i, col2i], you should do the following operation:

• Add 1 to every element in the submatrix with the top left corner (row1i, col1i) and the bottom right corner (row2i, col2i). That is, add 1 to mat[x][y] for all row1i <= x <= row2i and col1i <= y <= col2i.

Return the matrix mat after performing every query.

Example 1:

Input: n = 3, queries = [[1,1,2,2],[0,0,1,1]]

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

Explanation: The diagram above shows the initial matrix, the matrix after the first query, and the matrix after the second query.

• In the first query, we add 1 to every element in the submatrix with the top left corner (1, 1) and bottom right corner (2, 2).

• In the second query, we add 1 to every element in the submatrix with the top left corner (0, 0) and bottom right corner (1, 1).

Example 2:

Input: n = 2, queries = [[0,0,1,1]]

Output: [[1,1],[1,1]]

Explanation: The diagram above shows the initial matrix and the matrix after the first query.

• In the first query we add 1 to every element in the matrix.

Constraints:

• 1 <= n <= 500
• 1 <= queries.length <= 104
• 0 <= row1i <= row2i < n
• 0 <= col1i <= col2i < n

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[][]	rangeAddQueries(int n, int[][] queries)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

rangeAddQueries

public int[][] rangeAddQueries(int n,
 int[][] queries)