CreateRandomList(...);//Creates a random list and returns the id
DestroyRandomList(RandomList:ListID);//Destroys a random list
AddItemsToRandomList(RandomList:ListID, ...);//Add items to a existent random list
RemoveItemsFromRandomList(RandomList:ListID, ...);///Remove items from a existent random list
ClearRandomList(RandomList:ListID)//Remove all items from a existent random list

# MAX_RANDOM_LISTS      30 //Define as you like
# MAX_RANDOM_ITEMS      25 //Define as you like
# INVALID_LIST_ID       (RandomList:65535) 
# INVALID_SLOT          65535
# INVALID_RANDOM_NUMBER 65535 //Number thats return if you try to generate a random numer of a inexistent list

// *  Example 1  *
#include <a_samp>
#include <IRL>

new RandomList:MyRandomList;

public OnFilterScriptInit()
{
    MyRandomList = CreateRandomList(99,88,77,66,55,44,33,22,11);
    AddItemsToRandomList(MyRandomList, 900, 800, 700);
    RemoveItemsFromRandomList(MyRandomList, 99, 88, 77);
    printf("My Random Number: %d", RandomNumberFromList(MyRandomList));
    ClearRandomList(MyRandomList);
    printf("My Random Number: %d", RandomNumberFromList(MyRandomList));//will be printed: 65535(INVALID RANDOM NUMBER)
    return 1;
}
//* Example 2 *
new RandomList:PlayersRandomList;
new Hit[MAX_PLAYERS];

public OnGameModeInit()
{
    PlayersRandomList = CreateRandomList();
    return 1;
}

public OnPlayerConnect(playerid)
{
    AddItemsToRandomList(PlayersRandomList, playerid);
    return 1;
}

public OnPlayerDisconnect(playerid)
{
    RemoveItemsFromRandomList(PlayersRandomList, playerid);
    return 1;
}

public OnPlayerSpawn(playerid)
{
    new msg[128], randomhitforplayer = RandomNumberFromList(PlayersRandomList);
    if(randomlistforplayer != INVALID_RANDOM_NUMBER)
    {
                GetPlayerName(randomhitforplayer, msg, MAX_PLAYER_NAME);
        format(msg, sizeof msg, "You have a new hit! Kill {FF4040}%s{FFFFFF}!", msg);
        SendClientMessage(playerid, -1, msg);
        Hit[playerid] = randomhitforplayer;     
    }
    return 1;
}

public OnPlayerDeath(playerid, killerid, reason)
{
    if(IsPlayerConnected(killerid))
    {
        if(Hit[killerid] == playerid)
        {
            new msg[128], randomhitforplayer = RandomNumberFromList(PlayersRandomList);
            Hit[killerid] = randomhitforplayer;
            GetPlayerName(playerid, msg, MAX_PLAYER_NAME);
            format(msg, sizeof msg, "You killed %s and earned 500$", msg);
            SendClientMessage(killerid, -1, msg);
            format(msg, sizeof msg, "You have a new hit to do! Kill {FF4040}%s{FFFFFF}!", msg);
            SendClientMessage(killerid, -1, msg);
        }
    }
}