finish day 4

utils.h

@@ -0,0 +1,19 @@
+//
+// Created by Grant Horner on 12/4/25.
+//
+
+#pragma once
+#include <fstream>
+#include <sstream>
+#include <string_view>
+
+constexpr std::string_view to_string_view(const std::ranges::subrange<const char *> cs) {
+    return std::string_view{cs.data(), cs.size()};
+}
+
+inline std::string read_file(std::string_view path) {
+    std::ifstream input(path.data());
+    std::stringstream buffer;
+    buffer << input.rdbuf();
+    return buffer.str();
+}