How to Solve Count Square Submatrices with All Ones Problem
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Count Square Submatrices with All Ones
Given a m * n matrix of ones and zeros, return how many square submatrices have all ones.
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Understanding the Count Square Submatrices with All Ones Problem
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Problem Statement
Given a m * n matrix of ones and zeros, return how many square submatrices have all ones.
Count Square Submatrices with All Ones
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Examples
matrix =15There are 10 squares of side 1. There are 4 squares of side 2. There is 1 square of side 3. Total number of squares = 10 + 4 + 1 = 15.
matrix =7There are 6 squares of side 1. There is 1 square of side 2. Total number of squares = 6 + 1 = 7.
Constraints
1 <= arr.length <= 3001 <= arr[0].length <= 3000 <= arr[i][j] <= 1How Interview Coder Helps with Leetcode Problems
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