Because of a weird task requirement, folders are not allowed

Who tf came up with this limitation? Seriously...

identifier.hpp

@@ -0,0 +1,27 @@
+#pragma once
+#include <string>
+
+using std::string;
+
+class Identifier {
+public:
+    std::string nameSpace;
+    std::string path;
+
+    Identifier(std::string nameSpace, std::string path) : nameSpace(nameSpace), path(path) {}
+
+    std::ostream& operator<<(std::ostream& out) {
+        out << nameSpace << ":" << path;
+        return out;
+    }
+    std::istream& operator>>(std::istream& in) {
+        string input;
+        in >> input;
+        nameSpace = input.substr(0, input.find(":"));
+        path = input.substr(input.find(":") + 1, input.length());
+        return in;
+    }
+    bool operator==(Identifier otherId) {
+      return this->nameSpace == otherId.nameSpace && this->path == otherId.path;
+    }
+};