Problem ID Title Solved Submit Pass Rate
3438无重复全排列 [2*+]36057962.176%
3439从前M个字母中取N个的无重复排列 [2*+]19329565.424%
3440从前M个字母中任取N个的组合 [2*+]111291.667%
3441自然数的拆分问题 字典序41040.000%
3442马拦过河卒 knight33100.000%