#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <string.h>
#include <arpa/inet.h>

#define PORT 5000
#define IP "153.19.7.230"

void main(int argc, char* argv[]) {
    int value = atoi(argv[1]);
    struct sockaddr_in addr;
    int sd = socket(AF_INET, SOCK_DGRAM, 0);
    memset(&addr, 0, sizeof(addr));

    addr.sin_family = AF_INET;
    addr.sin_port = htons(PORT);
    inet_aton(IP, &addr.sin_addr);

    int len = sizeof(addr);
    bind(sd, (struct sockaddr*) &addr, len);

    int buffer = htonl(value);
    sendto(sd, (char*) &buffer, sizeof(int), 0, (struct sockaddr*) &addr, len);
    recvfrom(sd, (char*) &buffer, sizeof(int), 0, (struct sockaddr*) &addr, &len);
    buffer = ntohl(buffer);
    printf("%d*%d + 1 = %d\n", value, value, buffer);
}