Example 7 If at least one of A's height or weight is greater than B's, then A is said to be no less than B. Among 100 young men, if someone is no less than the other 99, he is called a good young man. Then, the maximum number of good young men among 100 young men is ( ).
(A) 1
(B) 2
(C) 50
(D) 100
(1995, National High School Mathematics Competition)
Obvi
ously, the $k$th
person $a_{k}$, his
height is not
less than the previous $(k-$
Analysis: We can construct 100 people $a_{i}(i=1,2,3, \cdots, 100)$ with heights and weights that are oppositely symmetric.
1) person, whose weight is not less than the next $(100-k)$ people, together not less than $(k-1)+(100-k)=99$ people. Therefore, everyone is a strong guy. Hence, the answer is (D).