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6283: question0047
Memory Limit:128 MB
Time Limit:1.000 S
Judge Style:Text Compare
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Solved:0
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Description
现有
8
个人排成一排照相,其中有
甲、乙、丙三人不能相邻的排法有几
种?
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题意的理解偏差出错
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排列组合