## [NOIP2013]车站分级

 Grade Open Time Friday, 19 September 2014, 10:07 am Discount 0.8 Time Discount Friday, 26 September 2014, 10:07 am Allow late Yes Close Time Friday, 26 September 2014, 10:07 am Input file level2013.in Output file level2013.out

### 【样例输入1】

9 2
4 1 3 5 6
3 3 5 6


### 【样例输出1】

2

### 【样例输入2】

9 3
4 1 3 5 6
3 3 5 6
3 1 5 9


### 【样例输出2】

3

NOIP2013普及组第四题