create input dir

src/main.cpp

@@ -49,6 +49,7 @@ int main(int argc, char *argv[]) {
     auto key = getSessionKey();
     bool useTestInput = false;
     auto days = getAllDays();
+    std::filesystem::create_directory("input");
 
     for (int i = 1; i < argc; i++){
         int dayNum = std::stoi(argv[i]);