1 files changed, 41 insertions, 0 deletions
diff --git a/2024/1A.cpp b/2024/1A.cpp
new file mode 100644
index 0000000..9cffc3b
--- /dev/null
+++ b/2024/1A.cpp
@@ -0,0 +1,41 @@
+#include <bits/stdc++.h>
+#include "readfile.hpp"
+
+
+int main(int argc, char const *argv[])
+{
+	int res = 0;
+	std::vector<std::string> file = readfile("1.in");
+	if (file.empty()) {
+		return 1;
+	}
+	std::vector<int> left, right;
+	for (const auto &line : file) {
+		int n1, n2;
+		// put to vector
+		std::istringstream iss(line);
+        if (!(iss >> n1 >> n2)) {
+            std::cerr << "Invalid input line: " << line << std::endl;
+            return 1;
+        }
+        left.push_back(n1);
+        right.push_back(n2);
+	}
+
+	// sort
+    std::sort(left.begin(), left.end());
+    std::sort(right.begin(), right.end());
+
+	if (left.size() != right.size()) {
+		std::cerr << "size mismatch: " << left.size() << " vs " << right.size() << std::endl;
+		return 1;
+	}
+
+	// calc total distant
+	for (int i = 0; i < left.size(); i++) {
+		res += std::abs(left[i] - right[i]);
+	}
+
+	std::cout << "Result: " << res << std::endl;
+	return 0;
+}