By a regulation, The time of a match is 3 minutes, and Extension is 2 minutes.
But there are a lot of players who appear on a tournament recently, so the length of a match is being reduced.

1,
Ippon-shobu is 1 minutes, and Extension is 30 seconds.
(Ippon-shobu is a match that is decided by one valid stroke. )

2,
Sanbon-shobu is 3 minutes, and Extension is minutes.
(Sanbon-shobu is a match that is decided by the first two poins gained by a single contestant. )

Please cooperate.