Added 933. Number of Recent Calls (#70)

* Added 933. Number of Recent Calls

* Update README.md

As stated I have updated the README.md file and listed the problem under queue section. Also I have added myself to the contributors list.

Author: tarunsinghdev

C++/Number-of-Recent-Calls.cpp

@@ -0,0 +1,20 @@
+#include<deque>
+class RecentCounter {
+    deque<int> req;
+public:
+    RecentCounter() {
+        req={};
+    }
+    
+    int ping(int t) {
+        req.push_back(t);
+        while(req.front() < t-3000) req.pop_front();
+        return req.size();
+    }
+};
+
+/**
+ * Your RecentCounter object will be instantiated and called as such:
+ * RecentCounter* obj = new RecentCounter();
+ * int param_1 = obj->ping(t);
+ */

README.md

@@ -161,6 +161,18 @@ Check out ---> [Sample PR](https://github.com/codedecks-in/LeetCode-Solutions/pu
 </div>
 <br/>
 
+# Queue
+
+| #    | Title                                                                                                           | Solution                                                                      | Time      | Space     | Difficulty | Tag                                            | Note |
+| ---- | --------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | --------- | --------- | ---------- | ---------------------------------------------- | ---- |
+| 933  | [Number of Recent Calls](https://leetcode.com/problems/number-of-recent-calls/)                      | [C++](./C++/Number-of-Recent-Calls.cpp )          | _O(1)_    | _O(1)_ | Easy     | Queue, Sliding Window 
+
+<br/>
+<div align="right">
+    <b><a href="#algorithms">⬆️ Back to Top</a></b>
+</div>
+<br/>
+
 # Tree
 
 | #    | Title                                                                                                           | Solution                                                                      | Time      | Space     | Difficulty | Tag                                            | Note |
@@ -375,6 +387,8 @@ DISCLAIMER: This above mentioned resources have affiliate links, which means if
 | [Prashansa Tanwar](https://github.com/prashansatanwar)  <br>  <img src="https://github.com/prashansatanwar.png" width="100" height="100">        | India   | C++                  | [Leetcode](https://leetcode.com/prashansaaa/) | 
 | [Ishu Raj](https://github.com/ir2010)  <br>  <img src="https://github.com/ir2010.png" width="100" height="100">   | India | C++ | [Leetcode](https://leetcode.com/ishuraj2010/) |
 | [Rakesh Bhadhavath](https://github.com/Revenge-Rakesh) <br> <img src="https://avatars2.githubusercontent.com/u/36032275?v=4" width="100" height="100"> | India   | Java          | [Leetcode](https://leetcode.com/goal_cracker/) |
+| [Tarun Singh](https://github.com/TarunSingh56) <br> <img src="https://avatars3.githubusercontent.com/u/25122604?s=400&u=d01f190e9a8c3790d408c38387c68b6bc9db2ea6&v=4" width="100" height="100"> | India   | C++         | [Leetcode](https://leetcode.com/_tarun/) |
+
 
 <br/>
 <div align="right">