diff --git a/backtracking/magic_sequence.cpp b/backtracking/magic_sequence.cpp
index 54f8217e1..573d032de 100644
--- a/backtracking/magic_sequence.cpp
+++ b/backtracking/magic_sequence.cpp
@@ -99,7 +99,6 @@ void solve(sequence_t* s, std::list<sequence_t>* ret, unsigned int depth = 0) {
 }
 
 }  // namespace magic_sequence
-
 }  // namespace backtracking
 
 /**