10个 16 ,15,14,13,12,11;25,24,23,22,21,34,33,32,31后为对称情况必重复,根据前面的列举,xy可取6,5,4,3,2,1,10,8,12,9共10种 实在是没有看懂啊,麻烦NN能不帮忙解释一下
实在是没有看懂啊,麻烦NN能不帮忙解释一下
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(x,y) can be (1,1)(1,2)(1,3)(1,4)(1,5)(1,6);(2,2)(2,3)(2,4)(2,5);(3,3)(3,4)
xy= 1,2,3,4,5,6;4,6,8,10;9,12
after we delete the duplicat 4,6, then only 1,2,3,4,5,6,8,9,10,12 left, total 10 numbers.
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