105. In a football championship, 16 teams participated. A team receives 2 points for a win; in the case of a draw in regular time, both teams take a series of penalty kicks, and the team scoring more goals gets one point. After 16 rounds, all teams accumulated 222 points. How many matches ended in a draw in regular time?
S o l u t i o n. In each round, 8 matches are played, so after 16 rounds, 128 matches were played $(8 \cdot 16=128)$. If all matches had ended in wins during regular time, the teams would have accumulated 256 points $(128 \cdot 2=256)$. Consequently, due to draws, 34 points were lost ( $256-222$ ), meaning 34 matches ended in draws during regular time.

A n s w e r: 34 matches.