for (int i = 0; i < tasks_count; i++) {
std::string worker_rank = std::to_string(i % workers_count);
std::string mailbox_name = std::string("worker-") + worker_rank;
for (int i = 0; i < tasks_count; i++) {
std::string worker_rank = std::to_string(i % workers_count);
std::string mailbox_name = std::string("worker-") + worker_rank;