diff --git a/README.md b/README.md
index 791a2e2c..4e74f727 100644
--- a/README.md
+++ b/README.md
@@ -102,6 +102,7 @@ In this repository, you can find the solutions (as source code) for the problems
 | [Nauman Chaudhary](https://github.com/nauman-chaudhary) <br> <img src="https://github.com/nauman-chaudhary.png" width="100" height="100">   | Pakistan   | Python |   |
 | [Gourav Rusiya](https://github.com/GouravRusiya30) <br> <img src="https://github.com/GouravRusiya30.png" width="100" height="100">   | India   | Java | https://www.hackerrank.com/gouravrusiya786  |
 | [Trushita Maurya](https://github.com/trushita23) <br> <img src="https://github.com/trushita23.png" width="100" height="100">   | India   | Java 
+| [Saida Jahan](https://github.com/sasasaida) <br> <img src="https://github.com/sasasaida.png" width="100" height="100">   | Bangladesh   | C++, Python 
 ### License
 
 [![MIT Licence](https://badges.frapsoft.com/os/mit/mit.svg?v=103)](https://github.com/ows-ali/Hacktoberfest/blob/master/LICENSE)
diff --git a/SPOJ/DANGER.cpp b/SPOJ/DANGER.cpp
new file mode 100644
index 00000000..81cc3e13
--- /dev/null
+++ b/SPOJ/DANGER.cpp
@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    while (true)
+    {
+        string s;
+        cin >> s;
+        if (s == "00e0")
+            break;
+
+        int n = stod(s);
+        int a = floor(log2(n));
+        int l = n - pow(2, a);
+        int result = 2 * l + 1;
+
+        cout << result << endl;
+    }
+}
\ No newline at end of file