四个数字有多少种组合

简介：After this month of preparation, the world of Battle.net is full of gunpowder. At this time, the teams of good and evil have gathered in the huge city of silver. There are millions of people participating in the battle, and there are more than 500,000 people on each side. There were a lot of heated ones. If the City of Silver hadn't banned fighting, I'm afraid they would have started fighting long ago.