Suppose that the sum of the numbers of any three people wearing sportswear is less than 32, and the number of at least one person is less than10 (32/3 =10.666666), and any adjacent three people in 19 can form 19 group (123, If each team is required to have at least one number less than 10, then there must be at least 19, and the number of athletes less than 10 is only 10, so it is impossible! So, the assumption is not true! The sum of their sportswear numbers can't be less than 32 (there are not so many integers less than 10)! So the sum of any three people's sportswear numbers will be at least one group larger than 32!