1183. Maximum Number of Ones

Consider a matrix M with dimensions width * height , such that every cell has value 0  or 1 , and any square  sub-matrix of M of size sideLength * sideLength  has at most maxOnes  ones.

Return the maximum possible number of ones that the matrix M can have.

 

Example 1:

Input:

 width = 3, height = 3, sideLength = 2, maxOnes = 1
Output:

 4
Explanation:

In a 3*3 matrix, no 2*2 sub-matrix can have more than 1 one.
The best solution that has 4 ones is:
[1,0,1]
[0,0,0]
[1,0,1]

Example 2:

Input:

 width = 3, height = 3, sideLength = 2, maxOnes = 2
Output:

 6
Explanation:

[1,0,1]
[1,0,1]
[1,0,1]

 

Constraints:

Difficulty:

Hard

Lock:

Prime

Company:

Qualcomm

Solution(Chinese):

LEETCODE 1183. Maximum Number of Ones 解题思路分析