Added codes for 17 May

GeeksForGeeks/May/17-5-24/GFG.java

@@ -0,0 +1,68 @@
+//{ Driver Code Starts
+import java.io.*;
+import java.util.*;
+
+class IntArray {
+    public static int[] input(BufferedReader br, int n) throws IOException {
+        String[] s = br.readLine().trim().split(" ");
+        int[] a = new int[n];
+        for (int i = 0; i < n; i++) a[i] = Integer.parseInt(s[i]);
+
+        return a;
+    }
+
+    public static void print(int[] a) {
+        for (int e : a) System.out.print(e + " ");
+        System.out.println();
+    }
+
+    public static void print(ArrayList<Integer> a) {
+        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 n;
+            n = Integer.parseInt(br.readLine());
+
+            int x;
+            x = Integer.parseInt(br.readLine());
+
+            int[] arr = IntArray.input(br, n);
+
+            Solution obj = new Solution();
+            int res = obj.findPair(n, x, arr);
+
+            System.out.println(res);
+        }
+    }
+}
+
+// } Driver Code Ends
+
+
+
+class Solution 
+{
+    public int findPair(int n, int x, int[] arr) 
+    {
+        // code here
+        HashSet<Integer> set = new HashSet<>();
+        for(int i=0; i<n; i++)
+        {
+            if(set.contains(arr[i]-x) || set.contains(arr[i]+x))
+                return 1;   //true
+
+            set.add(arr[i]);
+        }
+
+        return -1;  //false
+    }
+}

GeeksForGeeks/May/17-5-24/README.md

@@ -0,0 +1,2 @@
+Time complexity - O(n*logn)
+Space complexity - O(n)

LeetCode/May/17-5-24/README.md

@@ -0,0 +1,2 @@
+Time complexity - O(n)
+Space complexity - O(h)

LeetCode/May/17-5-24/Solution.java

@@ -0,0 +1,33 @@
+/**
+ * Definition for a binary tree node.
+ * public class TreeNode {
+ *     int val;
+ *     TreeNode left;
+ *     TreeNode right;
+ *     TreeNode() {}
+ *     TreeNode(int val) { this.val = val; }
+ *     TreeNode(int val, TreeNode left, TreeNode right) {
+ *         this.val = val;
+ *         this.left = left;
+ *         this.right = right;
+ *     }
+ * }
+ */
+class Solution 
+{
+    public TreeNode removeLeafNodes(TreeNode root, int target) 
+    {
+        if (root == null)
+            return null;
+
+        root.left = removeLeafNodes(root.left, target);
+        root.right = removeLeafNodes(root.right, target);
+
+        return isLeaf(root) && root.val == target ? null : root;
+    }
+
+    private boolean isLeaf(TreeNode root) 
+    {
+        return root.left == null && root.right == null;
+    }
+}