day01: use structure binding in range for loop

1 files changed, 5 insertions, 4 deletions

diff --git a/day01/solution.cpp b/day01/solution.cpp
index 78535a3..86d4efb 100644
--- a/day01/solution.cpp
+++ b/day01/solution.cpp
@@ -9,6 +9,7 @@
 #include <utility>
 
 namespace ranges = std::ranges;
+namespace views = std::views;
 
 const auto parse_input() {
   std::pair<std::vector<int>, std::vector<int>> result;
@@ -28,8 +29,8 @@ void part1(auto input) {
   ranges::sort(B);
 
   int sum = 0;
-  for (auto [x, y] : std::views::zip(A, B)) {
-    sum += std::abs(x - y);
+  for (const auto& [a, b] : views::zip(A, B)) {
+    sum += std::abs(a - b);
   }
 
   std::println("{}", sum);
@@ -47,8 +48,8 @@ void part2(auto input) {
   }
 
   int sum = 0;
-  for (auto a : freq_A) {
-    sum += a.first * a.second * freq_B[a.first];
+  for (const auto& [a, b] : freq_A) {
+    sum += a * b * freq_B[a];
   }
 
   std::println("{}", sum);