英语翻译The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for every from to one can find a subset of the numbers that appear consecutively on the circle that sum to .Arrangements that differ only by a rotation or a reflection are considered the same.How many different bad arrangements are there?主要是第二句看不太懂,The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for ev
英语翻译
The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for every from to one can find a subset of the numbers that appear consecutively on the circle that sum to .Arrangements that differ only by a rotation or a reflection are considered the same.How many different bad arrangements are there?
主要是第二句看不太懂,
The numbers 1,2,3,4,5 are to be arranged in a circle.An arrangement is bad if it is not true that for every n from 1 to 15 one can find a subset of the numbers that appear consecutively on the circle that sum to n.Arrangements that differ only by a rotation or a reflection are considered the same.How many different bad arrangements are there?
前面的漏了几个字，看这里
就是说1 2 3 4 5五个数字排成一圈.然后呢有一种叫bad arrangement,先说怎么样不是bad arrangement吧,不是bad arrangement的安排必须满足从1到15,每个数字,都是在这个圈里可以找到的连续几个数字的和.比如这个数字圈...