From cc6ce22409397f854d8928762646abb06f1c570f Mon Sep 17 00:00:00 2001
From: Tanmay-312 <jain2002tj@gmail.com>
Date: Tue, 14 May 2024 20:18:55 +0530
Subject: [PATCH] Added codes for 14 May

---
 GeeksForGeeks/May/14-5-24/GFG.java  | 104 ++++++++++++++++++++++++++++
 GeeksForGeeks/May/14-5-24/README.md |   2 +
 LeetCode/May/14-5-24/README.md      |   2 +
 LeetCode/May/14-5-24/Solution.java  |  29 ++++++++
 4 files changed, 137 insertions(+)
 create mode 100644 GeeksForGeeks/May/14-5-24/GFG.java
 create mode 100644 GeeksForGeeks/May/14-5-24/README.md
 create mode 100644 LeetCode/May/14-5-24/README.md
 create mode 100644 LeetCode/May/14-5-24/Solution.java

diff --git a/GeeksForGeeks/May/14-5-24/GFG.java b/GeeksForGeeks/May/14-5-24/GFG.java
new file mode 100644
index 0000000..34dddd4
--- /dev/null
+++ b/GeeksForGeeks/May/14-5-24/GFG.java
@@ -0,0 +1,104 @@
+//{ Driver Code Starts
+import java.io.*;
+import java.util.*;
+
+class IntMatrix {
+    public static int[][] input(BufferedReader br, int n, int m) throws IOException {
+        int[][] mat = new int[n][];
+
+        for (int i = 0; i < n; i++) {
+            String[] s = br.readLine().trim().split(" ");
+            mat[i] = new int[s.length];
+            for (int j = 0; j < s.length; j++) mat[i][j] = Integer.parseInt(s[j]);
+        }
+
+        return mat;
+    }
+
+    public static void print(int[][] m) {
+        for (var a : m) {
+            for (int e : a) System.out.print(e + " ");
+            System.out.println();
+        }
+    }
+
+    public static void print(ArrayList<ArrayList<Integer>> m) {
+        for (var a : m) {
+            for (int e : a) System.out.print(e + " ");
+            System.out.println();
+        }
+    }
+}
+
+class GFG {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int t;
+        t = Integer.parseInt(br.readLine());
+        while (t-- > 0) {
+
+            int rows;
+            rows = Integer.parseInt(br.readLine());
+
+            int columns;
+            columns = Integer.parseInt(br.readLine());
+
+            int[][] heights = IntMatrix.input(br, rows, columns);
+
+            Solution obj = new Solution();
+            int res = obj.MinimumEffort(rows, columns, heights);
+
+            System.out.println(res);
+        }
+    }
+}
+
+// } Driver Code Ends
+
+
+
+class Solution 
+{
+    public static int MinimumEffort(int rows, int columns, int[][] heights) 
+    {
+        // code here
+        int[][] effort = new int[rows][columns];
+        for (int i = 0; i < rows; i++)
+            Arrays.fill(effort[i], Integer.MAX_VALUE);
+        
+        PriorityQueue<int[]> pq = new PriorityQueue<>((a, b) -> a[2] - b[2]);
+        pq.offer(new int[]{0, 0, 0}); // (row, col, effort)
+        
+        int[][] directions = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
+        
+        while (!pq.isEmpty()) 
+        {
+            int[] curr = pq.poll();
+            int row = curr[0];
+            int col = curr[1];
+            int currEffort = curr[2];
+            
+            if (row == rows - 1 && col == columns - 1)
+                return currEffort;
+            
+            for (int[] dir : directions) 
+            {
+                int newRow = row + dir[0];
+                int newCol = col + dir[1];
+                
+                if (newRow >= 0 && newRow < rows && newCol >= 0 && newCol < columns) 
+                {
+                    int newEffort = Math.max(currEffort, Math.abs(heights[newRow][newCol] - heights[row][col]));
+                    
+                    if (newEffort < effort[newRow][newCol]) 
+                    {
+                        effort[newRow][newCol] = newEffort;
+                        pq.offer(new int[]{newRow, newCol, newEffort});
+                    }
+                }
+            }
+        }
+        
+        return -1; // Unreachable
+    }
+}
diff --git a/GeeksForGeeks/May/14-5-24/README.md b/GeeksForGeeks/May/14-5-24/README.md
new file mode 100644
index 0000000..8faf6d9
--- /dev/null
+++ b/GeeksForGeeks/May/14-5-24/README.md
@@ -0,0 +1,2 @@
+Time complexity - O(n*m)
+Space complexity - O(n*m)
diff --git a/LeetCode/May/14-5-24/README.md b/LeetCode/May/14-5-24/README.md
new file mode 100644
index 0000000..07b8c6a
--- /dev/null
+++ b/LeetCode/May/14-5-24/README.md
@@ -0,0 +1,2 @@
+Time complexity - O(3^(n*m))
+Space complexity - O(n*m)
diff --git a/LeetCode/May/14-5-24/Solution.java b/LeetCode/May/14-5-24/Solution.java
new file mode 100644
index 0000000..14e77be
--- /dev/null
+++ b/LeetCode/May/14-5-24/Solution.java
@@ -0,0 +1,29 @@
+class Solution 
+{
+    public int getMaximumGold(int[][] grid) 
+    {
+        int ans = 0;
+
+        for (int i = 0; i < grid.length; ++i)
+            for (int j = 0; j < grid[0].length; ++j)
+                ans = Math.max(ans, dfs(grid, i, j));
+
+        return ans;
+    }
+
+    private int dfs(int[][] grid, int i, int j) 
+    {
+        if (i < 0 || j < 0 || i == grid.length || j == grid[0].length)
+            return 0;
+        if (grid[i][j] == 0)
+            return 0;
+
+        int gold = grid[i][j];
+        grid[i][j] = 0; // Mark as visited
+        int maxPath = Math.max(Math.max(dfs(grid, i + 1, j), dfs(grid, i - 1, j)),
+                                    Math.max(dfs(grid, i, j + 1), dfs(grid, i, j - 1)));
+        
+        grid[i][j] = gold;
+        return gold + maxPath;
+    }
+}