题目描述 For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decreasing order, a new number can be obtained by
1069. Prufer Code Time limit: 0.25 second Memory limit: 8 MB A tree (i.e. a connected graph without cycles) with vertices is given ( N ≥ 2). Vertices of the tree are numbered by the integer
1069 The Black Hole of Numbers 分数 20 For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decreasing order