时间限制: 2s
内存限制: 192MB 提交: 739 解决: 381
题目描述
如下列数,第一项是1/1,第二项是1/2,第三项是2/1,第四项是3/1,第五项是2/2,……。输入n(n<20000),输出第n项。
1/1 1/2 1/3 1/4 1/5
2/1 2/2 2/3 2/4
3/1 3/2 3/3
4/1 4/2
5/1
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