Package g1201_1300.s1277_count_square_submatrices_with_all_ones

Class Solution

java.lang.Object

g1201_1300.s1277_count_square_submatrices_with_all_ones.Solution

public class Solution
extends Object

1277 - Count Square Submatrices with All Ones\. Medium Given a `m * n` matrix of ones and zeros, return how many **square** submatrices have all ones. **Example 1:** **Input:** matrix = [ [0,1,1,1], [1,1,1,1], [0,1,1,1] ] **Output:** 15 **Explanation:** There 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**. **Example 2:** **Input:** matrix = [ [1,0,1], [1,1,0], [1,1,0] ] **Output:** 7 **Explanation:** There are **6** squares of side 1. There is **1** square of side 2. Total number of squares = 6 + 1 = **7**. **Constraints:** * `1 <= arr.length <= 300` * `1 <= arr[0].length <= 300` * `0 <= arr[i][j] <= 1`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	countSquares(int[][] matrix)

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

countSquares

public int countSquares(int[][] matrix)