Added codes for 12 June

GeeksForGeeks/June/12-6-24/GFG.java

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+//{ Driver Code Starts
+import java.io.*;
+import java.util.*;
+
+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());
+
+            Solution obj = new Solution();
+            int res = obj.countNumberswith4(n);
+
+            System.out.println(res);
+        }
+    }
+}
+
+// } Driver Code Ends
+
+
+
+class Solution
+{
+    public static int countNumberswith4(int n)
+    {
+        // code here
+        int c=0;
+        for(int i=0;i<=n;i++)
+        {
+            if(String.valueOf(i).contains("4"))
+                c++;
+        }
+        return c;
+    }
+}

GeeksForGeeks/June/12-6-24/README.md

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

LeetCode/June/12-6-24/README.md

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

LeetCode/June/12-6-24/Solution.java

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+class Solution {
+    public void sortColors(int[] nums) {
+        // 1ms solution
+        // Arrays.sort(nums);
+
+        // 0ms solution
+        int zero = -1;
+        int one = -1;
+        int two = -1;
+
+        for (int num : nums)
+        {
+            if (num == 0)
+            {
+                nums[++two] = 2;
+                nums[++one] = 1;
+                nums[++zero] = 0;
+            }
+            else if (num == 1)
+            {
+                nums[++two] = 2;
+                nums[++one] = 1;
+            }
+            else
+            {
+                nums[++two] = 2;
+            }
+        }
+    }
+}