[SickAttack]

It's simple as this:

pawn Код:

new PlayersAliveOnTeam[2];

public OnPlayerDisconnect(playerid, reason)
{
    if(IsPlayerAlive(playerid))
    {
        PlayersAliveOnTeam[player's team] --;
    }
    return 1;
}

public OnPlayerSpawn(playerid)
{
    PlayersAliveOnTeam[player's team] ++;
    return 1;
}

public OnPlayerDeath(playerid)
{
    PlayersAliveOnTeam[player's team] --;
    return 1;
}

Replace "player's team" for the ID of the team a player is in.

0 = Team A
1 = Team B
2 = Total Amount of Teams