fix: use string for filenames

1 files changed, 1 insertions, 1 deletions

diff --git a/2016/src/day01.cpp b/2016/src/day01.cpp
index f5d74a5..6e5b720 100644
--- a/2016/src/day01.cpp
+++ b/2016/src/day01.cpp
@@ -30,7 +30,7 @@ split(string_view line, string_view delimiter)
 }
 
 vector<tuple<char, long>>
-read_file(string_view filename)
+read_file(const string& filename)
 {
         fstream input{ filename };
         string  content{ istreambuf_iterator<char>{ input }, istreambuf_iterator<char>{} };