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题目内容
A 100-dollar bill is exchanged at a bank for bills in denominations of 5, 10, and 20 dollars. If each of the three types of bills is received, what is the least number of bills that could be received?
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· 相关考点
1.1.3 和固定条件下求最大/最小值
以上解析由 考满分老师提供。