1 files changed, 6 insertions, 7 deletions

diff --git a/src/day09.cpp b/src/day09.cpp
index 0019d05..4b30e6e 100644
--- a/src/day09.cpp
+++ b/src/day09.cpp
@@ -45,10 +45,8 @@ solve_rec(const vector<T>& values)
 }
 
 void
-part1()
+part1(const vector<string>& lines)
 {
-        auto lines = read_file("data/day09.txt");
-
         long sum = 0;
         for ( const auto& line: lines ) {
                 sum += solve_rec(read_ints(line));
@@ -57,10 +55,10 @@ part1()
 }
 
 void
-part2()
+part2(const vector<string>& lines)
 {
         long sum = 0;
-        for ( const auto& line: read_file("data/day09.txt") ) {
+        for ( const auto& line: lines ) {
                 auto values = read_ints(line);
                 reverse(values.begin(), values.end());
                 sum += solve_rec(values);
@@ -71,6 +69,7 @@ part2()
 int
 main()
 {
-        part1();
-        part2();
+        auto lines = read_file("data/day09.txt");
+        part1(lines);
+        part2(lines);
 }