1 files changed, 51 insertions, 0 deletions

diff --git a/day01/solution.cpp b/day01/solution.cpp
new file mode 100644
index 0000000..b19504e
--- /dev/null
+++ b/day01/solution.cpp
@@ -0,0 +1,51 @@
+#include <print>
+#include <vector>
+#include <iostream>
+#include <algorithm>
+#include <ranges>
+#include <map>
+
+void part1(std::vector<int> A, std::vector<int> B) {
+  std::sort(A.begin(), A.end());
+  std::sort(B.begin(), B.end());
+
+  int sum = 0;
+  for (auto [x, y] : std::views::zip(A, B)) {
+    sum += std::abs(x - y);
+  }
+
+  std::println("{}", sum);
+}
+
+void part2(std::vector<int> A, std::vector<int> B) {
+  std::map<int, int> _A, _B;
+
+  for (auto a : A) {
+    _A[a]++;
+  }
+  for (auto b : B) {
+    _B[b]++;
+  }
+
+  int sum = 0;
+  for (auto a : _A) {
+    sum += a.first * a.second * _B[a.first];
+  }
+
+  std::println("{}", sum);
+}
+
+int main() {
+  std::vector<int> A, B;
+
+  int a, b;
+  while (std::cin >> a >> b) {
+    A.push_back(a);
+    B.push_back(b);
+  }
+
+  part1(A, B);
+  part2(A, B);
+
+  return 0;
+}