Distribute 135 biscuits to 16 children. If each child needs at least one biscuit, then no matter how you divide it, there must be two children who get the same number of biscuits. Why?
把135块饼干分给16个小朋友，若每个小朋友至少要分到一块饼干，那么不管怎样分，一定会有两个小朋友得到的饼干数目相同．为什么？
<result>2</result>