Added CountSquareSubMatricesWithAllOnes solution (#96)

* Added Regular Expression matching

* Revert "Added Regular Expression matching"

This reverts commit 4449207.

* Added CountSquareSubMatricesWithAllOnes solution

LeetCode/Algorithms/Medium/CountSquareSubMatricesWithAllOnes/CountSquareSubMatricesWithAllOnes.java

@@ -0,0 +1,29 @@
+class CountSquareSubMatricesWithAllOnes {
+    public int countSquares(int[][] matrix) {
+        //Find no of rows and columns
+        int rows=matrix.length;
+        int cols=matrix[0].length;
+
+        for(int i=1;i<rows;i++)
+        {
+            for(int j=1;j<cols;j++)
+            {
+                if(matrix[i][j]==1)
+                {
+                    matrix[i][j]+=Math.min(matrix[i-1][j],Math.min(matrix[i][j-1],matrix[i-1][j-1]));
+                }
+            }
+        }
+
+        //Number of squares possible
+        int total=0;
+        for(int i=0;i<rows;i++)
+        {
+            for(int j=0;j<cols;j++)
+            {
+                total+=matrix[i][j];
+            }
+        }
+        return total;
+    }
+}