B. Broken Sequence - Mashup Trainings Day 3: F0RE1GNERS' Contest - ECNU Online Judge

你可以在这里下载。

单点时限: 2.0 sec

内存限制: 512 MB

样例

Input

2 1
1 1
2 2

Output

Input

5 5
9384 887 2778 6916 7794
2 8336
5 493
3 1422
1 28
4 60

Output

NaN

A. Adjacent Seats B. Broken Sequence C. Casino Cheating D. Deprecated Template Book E. Excellent Programmer F. Freshman's Dream G. Generate Problems H. Head-tail Palindromes I. Interesting Nim Game J. Jump K. Kidnapping