diff --git a/Digit DP.cpp b/Digit DP.cpp
index 32ff9f2..a08b6b6 100644
--- a/Digit DP.cpp	
+++ b/Digit DP.cpp	
@@ -36,5 +36,9 @@ int f(int k)
 	return ans;
 }
 
+//Example of using with both L and R: https://github.com/nachiketkanore/CP-Snippets/blob/master/Digit_DP_%5BL%2CR%5D_some_property.cpp
+
 //Problem 1: https://codeforces.com/contest/1036/problem/C
 
+//Problem 2: https://codeforces.com/contest/628/problem/D
+