diff --git a/Euler1.cpp b/Euler1.cpp
index 330287d..7400e0e 100644
--- a/Euler1.cpp
+++ b/Euler1.cpp
@@ -1,3 +1,5 @@
+// Euler1.cpp
+
 #include <iostream>
 using namespace std;
 
@@ -10,4 +12,4 @@ int main() {
 	}
 	cout << sum << endl;
 	return 0;
-}
\ No newline at end of file
+}