5669脑筋急转弯中等数值题short
Five Gifts Four Children Surjection
题目
Five distinct gifts are distributed to 4 distinct children so that every child receives at least one gift. In how many ways can this be done?
解题计时
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提交作答时记录，用于后续平均用时统计。
你的答案
题目
Five distinct gifts are distributed to 4 distinct children so that every child receives at least one gift. In how many ways can this be done?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案