Added codes for 24 April

GeeksForGeeks/April/24-4-24/GFG.java

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+//{ Driver Code Starts
+//Initial Template for Java
+
+
+import java.io.*;
+import java.util.*;
+
+
+// } Driver Code Ends
+//User function Template for Java
+
+
+class Solution
+{
+    public static int ways(int n, int m)
+    {
+        // complete the function
+        int[][] dp = new int[n + 1][m + 1];
+        for (int i = 0; i <= n; i++) 
+        {
+            dp[i][0] = 1;
+        }
+
+        for (int i = 0; i <= m; i++) 
+        {
+            dp[0][i] = 1;
+        }
+
+        for (int i = 1; i <= n; i++) 
+        {
+            for (int j = 1; j <= m; j++) 
+            {
+                dp[i][j] = (dp[i - 1][j] + dp[i][j - 1]) % 1000000007;
+            }
+        }
+        return dp[n][m];
+    }
+}
+
+//{ Driver Code Starts.
+
+// Driver class
+class Array {
+
+    // Driver code
+	public static void main (String[] args) throws IOException{
+		// Taking input using buffered reader
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+		int testcases = Integer.parseInt(br.readLine());
+		// looping through all testcases
+		while(testcases-- > 0){
+		    String line = br.readLine();
+		    String[] elements = line.trim().split("\\s+");
+		    int x=Integer.parseInt(elements[0]);
+		    int y=Integer.parseInt(elements[1]);
+		    Solution ob = new Solution();
+		    System.out.println(ob.ways(x,y));
+		}
+	}
+}
+// } Driver Code Ends

GeeksForGeeks/April/24-4-24/README.md

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

LeetCode/April/24-4-24/README.md

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+Time complexity - O(n)
+Space complexity - O(1)

LeetCode/April/24-4-24/Solution.java

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+class Solution 
+{
+    public int tribonacci(int n) 
+    {
+        if (n<2)
+            return n;
+
+        int prev = 0;
+        int curr = 1;
+        int next = 1;
+
+        for (int i=3; i<=n; i++)
+        {
+            int temp = next;
+            next = next + curr + prev;
+            prev = curr;
+            curr = temp;
+        }
+
+        return next;
+    }
+}