Football match problem

1 * * * Set four competition days: the first day, the fourth day, the seventh day and the tenth day. If it rains, it will be postponed for one day; Considering the physical fitness of the students, the competition time is 1 hour, which is divided into the first half and the second half. 60 minutes, 20 minutes in tie overtime, first half 10 minutes, second half 10 minutes, and then penalty kick tied.

Day 1: Six teams will be divided into three groups by drawing lots, and the winning three teams will enter the next round of elimination;

Day 4: The loser team 3 played a 10 minute single round robin. According to the goal difference, decide 1 which team can meet the other three teams in the semi-final. The goal difference is the same and the record is a draw. The two teams can implement the golden ball system, and whoever scores first will be promoted.

Day 7: The above four teams draw lots for the rematch, and the loser enters the third place final, and the winner enters the third place in the championship;

Day 10: Third place final and first and second place competition