diff --git a/challengers-list.md b/challengers-list.md
index 2fb6f60ea..7c6ad3c2a 100644
--- a/challengers-list.md
+++ b/challengers-list.md
@@ -1,4 +1,6 @@
 # List of challengers
 1. [Mrinal](https://github.com/mrinal1224)
 2. [Shivay](https://github.com/shivaylamba)
-3. [Raghav](https://github.com/raghavdhingra)
+3. [Chaitanya Yadav](https://github.com/cy2000yadav)
+4. [Raghav](https://github.com/raghavdhingra)
+
diff --git a/contributors/cy2000yadav/cy2000yadav.md b/contributors/cy2000yadav/cy2000yadav.md
new file mode 100644
index 000000000..bd2a5b1c3
--- /dev/null
+++ b/contributors/cy2000yadav/cy2000yadav.md
@@ -0,0 +1,8 @@
+---
+name: Chaitanya Yadav
+github_user_name: cy2000yadav
+url_of_github_issue: https://github.com/scaleracademy/scaler-september-open-source-challenge/issues/116
+your_favroite_programming_language: python
+your_hosted_github_pages_link: https://cy2000yadav.github.io/portfolio-website/
+your_hosted_github_pages_repository_link: https://github.com/cy2000yadav/portfolio-website
+---
diff --git a/contributors/cy2000yadav/gist-solutions.md b/contributors/cy2000yadav/gist-solutions.md
new file mode 100644
index 000000000..5e6f20d30
--- /dev/null
+++ b/contributors/cy2000yadav/gist-solutions.md
@@ -0,0 +1,4 @@
+# Challange 18 - gist task
+
+- Task 1 : [File handling in c](https://gist.github.com/cy2000yadav/606114650789ec80be2a949053cd8978)
+- Task 2 : [Example on file handling in c](https://gist.github.com/cy2000yadav/2420e7475e4bff7377941e4ffe995f49)
diff --git a/contributors/cy2000yadav/sum_digits.py b/contributors/cy2000yadav/sum_digits.py
new file mode 100644
index 000000000..7bcca624a
--- /dev/null
+++ b/contributors/cy2000yadav/sum_digits.py
@@ -0,0 +1,6 @@
+n = input()
+total = 0
+for ele in n:
+    total += int(ele)
+
+print("Sum of digits of the number " + n + " is", total)