[Medal Of Honor team]

How will i make auto team balance?

if(classid == 0)
{
gTeam[playerid] = TEAM_USA;
}
else if(classid == 1)
{
gTeam[playerid] = TEAM_GERMANY;
}
else if(classid == 2)
{
gTeam[playerid] = TEAM_MERC;
}
else if(classid == 3)
{
gTeam[playerid] = TEAM_RUSSIA;
}
else if(classid == 4)
{
gTeam[playerid] = TEAM_JAPAN;
}