diff --git a/src/day3.cpp b/src/day3.cpp
index 41d8c77..aaa2366 100644
--- a/src/day3.cpp
+++ b/src/day3.cpp
@@ -7,15 +7,13 @@
 #include <string_view>
 #include <vector>
 
-using Data = std::string;
-
-int64_t part_1(const std::vector<Data> &);
-int64_t part_2(const std::vector<Data> &);
+int64_t part_1(const std::vector<std::string> &);
+int64_t part_2(const std::vector<std::string> &);
 
 int main() {
   std::ifstream file{"input/2025-3.txt"};
-  Data line;
-  std::vector<Data> v;
+  std::string line;
+  std::vector<std::string> v;
   while (std::getline(file, line)) {
     v.push_back(line);
   }
@@ -42,7 +40,7 @@ int64_t solve(const std::string_view line, size_t cnt_to_activate) {
   return std::stoll(std::string(&max_char) + std::to_string(recur));
 }
 
-int64_t part_1(const std::vector<Data> &v) {
+int64_t part_1(const std::vector<std::string> &v) {
   int64_t ans{};
   for (auto d : v) {
     ans += solve(d, 2);
@@ -50,7 +48,7 @@ int64_t part_1(const std::vector<Data> &v) {
   return ans;
 }
 
-int64_t part_2(const std::vector<Data> &v) {
+int64_t part_2(const std::vector<std::string> &v) {
   int64_t ans{};
   for (auto d : v) {
     ans += solve(d, 12);