[ReneG]

pawn Код:

public OnPlayerDeath(playerid, killerid, reason) 
{
    if(killerid != INVALID_PLAYER_ID) {
        seconds[killerid] += 180;
    }
    // rest of your code 
    return 1;
}

also in the timer change it to

Код:

if(seconds[i] >= 1800)

because if a player is 10 seconds away from gaining score and kills someone, no score for them.