10. Distribute 100 apples to several people, with each person getting at least one apple, and each person receiving a different number of apples. Then, the maximum number of people is $\qquad$.
10. Suppose there are $n$ people, and the number of apples distributed to each person is $1,2, \cdots, n$. It follows that
$$
1+2+3+\cdots+n=\frac{n(n+1)}{2} \leqslant 100 .
$$
$\therefore n \leqslant 13$, i.e., there are at most 13 people.