Added codes for 14 March

GeeksForGeeks/March/14-3-24/GFG.java

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+//{ Driver Code Starts
+// Initial Template for Java
+
+import java.io.*;
+import java.util.*;
+
+class GFG {
+    public static void main(String args[]) throws IOException {
+        BufferedReader read =
+            new BufferedReader(new InputStreamReader(System.in));
+        int t = Integer.parseInt(read.readLine());
+        while (t-- > 0) {
+            int N = Integer.parseInt(read.readLine());
+            char A[][] = new char[N][N];
+            for (int i = 0; i < N; i++) {
+                String S[] = read.readLine().trim().split(" ");
+                for (int j = 0; j < N; j++) A[i][j] = S[j].charAt(0);
+            }
+            Solution ob = new Solution();
+            System.out.println(ob.largestSubsquare(N, A));
+        }
+    }
+}
+// } Driver Code Ends
+
+
+// User function Template for Java
+
+class Solution 
+{
+    int largestSubsquare(int n, char a[][]) 
+    {
+        // code here
+        int side=0;
+        int[][] ver = new int[n][n];
+        int[][] hor = new int[n][n];
+
+        for(int i = 0; i < n ; i++)
+        {
+            for(int j = 0 ; j < n ; j++)
+            {
+                if(a[i][j] == 'X')
+                {
+                    ver[i][j] = ((i == 0) ? 1 : ver[i-1][j] + 1);
+                    hor[i][j] = ((j == 0) ? 1 : hor[i][j-1] + 1);
+                }
+            }
+        }
+
+
+        for(int i = n-1 ; i >= 0 ; i--)
+        {
+            for(int j = n-1 ; j >= 0 ; j--)
+            {
+                int val = Math.min(ver[i][j] , hor[i][j]);
+
+                while(val > side)
+                {
+                    if(ver[i][j-val+1] >= val && hor[i-val+1][j] >= val)
+                    {
+                        side = val;
+                    }
+
+                    val--;
+                }
+            }
+        }
+
+        return side;
+    }
+};

GeeksForGeeks/March/14-3-24/README.md

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+Time complexity - O(n^2)
+Space complexity - O(n^2)

LeetCode/March/14-3-24/README.md

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+Time complexity - O(n)
+Space complexity - O(n)

LeetCode/March/14-3-24/Solution.java

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+class Solution 
+{
+    public int numSubarraysWithSum(int[] nums, int goal) 
+    {
+        int ans = 0;
+        int prefix = 0;
+        Map<Integer, Integer> count = new HashMap<>();
+        count.put(0, 1);
+
+        for (int num : nums) 
+        {
+            prefix += num;
+            int key = prefix - goal;
+
+            if (count.containsKey(key))
+                ans += count.get(key);
+
+            count.merge(prefix, 1, Integer::sum);
+        }
+
+        return ans;
+    }
+}