a.c

#include <stdio.h>
#include "hydrogen.h"

/*
 * Full list of retweets retrieved with the Ruby Twitter gem
 * c.retweets(939508006064152577, count: 100).map { |a| "@" + a.user.screen_name }
 */

static const char *retweeters[] = {
    "@Pharaildys", "@beddari", "@Martin_Soucek", "@laloozhome", "@tukak", "@Petrroll", "@themorcatko", "@kweenolog", "@gracnar", "@connor_catan", "@cherenkov_d", "@TortiPesto", "@wasyl1984", "@mmister", "@vince2_", "@cotomate", "@tlamr", "@lunarthegrey", "@alesroubicek", "@HanaSvabova", "@jdfitzgerald", "@karthikbhata", "@FrankEndrullat", "@janpmartinek", "@satai", "@oerdnj", "@skeetmtp", "@diver2daze", "@_Bytemare", "@DavidGuyon", "@0x663030623472", "@latetothe", "@metabaron", "@hggh_", "@WawaSeb", "@MarchingKadima", "@j0echip", "@zuluzim909", "@jpmens", "@AaronToponce", "@DoizeceDoizero", "@icristerna2", "@rhapsodhy", "@istanboolean", "@chris_donoghue", "@debdeepd1", "@odolbeau", "@PoorCryptoLover", "@MrTurkey", "@DTarrero", "@GuiGui2_", "@tosadvsr", "@nuclearleb", "@PenfoldDavid", "@Black6h0st", "@voutilad", "@hasherezade"
};

int main(void)
{
    unsigned char  key[randombytes_SEEDBYTES];
    size_t         retweeters_nb = (sizeof retweeters) / (sizeof retweeters[0]);
    size_t         retweeter;
    int            i;
    
    if (hydro_init() != 0) {
        return 1;
    }
    hydro_hash_hash(key, sizeof key, "Merry Xmas", sizeof "Merry Xmas" - 1,
                    "0bitcoin", NULL, 0);
    for (i = 0; i < 6; i++) {
        do {
            randombytes_buf_deterministic(&retweeter, sizeof retweeter, key);
            hydro_increment(key, sizeof key);
        } while (retweeter < ((size_t) 1U + ~retweeters_nb) % retweeters_nb);
        retweeter %= retweeters_nb;
        puts(retweeters[retweeter]);        
        if (--retweeters_nb == 0) {
            break;
        }
        retweeters[retweeter] = retweeters[retweeters_nb];
    }
    return 0;
}