#include <cassert>
#include <cstdio>
#include <cstring>
#include <cassert>
#include <cstdio>
#include <cstring>
+#include <netdb.h>
+#include <netinet/in.h>
#include <string>
#include <unistd.h>
#include <vector>
#include <string>
#include <unistd.h>
#include <vector>