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我们在求解排列问题时,常会遇到许多有条件限制问题,若对条件个体我们能够从不同的角度去分析,多角度去思考,则会有不同的方法.本文拟结合两例说明:
When we solve the problem of ranking, we often encounter many problems with conditional constraints. If we can analyze the conditional individuals from different perspectives and think from different perspectives, there will be different approaches. This article is intended to combine two examples: