FILE* in_file = fopen(filename.c_str(), "r");
xbt_assert(in_file != nullptr, "Failed to open file: %s", filename.c_str());
FILE* in_file = fopen(filename.c_str(), "r");
xbt_assert(in_file != nullptr, "Failed to open file: %s", filename.c_str());
std::unordered_map<std::string, ActivityPtr> activities;
std::vector<ActivityPtr> dag;
std::unordered_map<std::string, ActivityPtr> activities;
std::vector<ActivityPtr> dag;