选数排列
You cannot submit for this problem because the contest is ended. You can click "Open in Problem Set" to view this problem in normal mode.
题目描述
从 个数里选 个数,打印所有方案。
输入格式
单独一行,两个整数 。
输出格式
所有方案,一行一个。
3 1
1
2
3
5 3
123
124
125
134
135
145
234
235
245
345
数据范围