Attention: The time limit was revised to 3.0 seconds.
The size of the input file does not exceed 12.5 MiB.
It is guaranteed that $\sum n \leq 2^{20}$
QOJ.ac
QOJ
Time Limit:
3 s
Memory Limit:
512 MB
# 3077. How to Deal With Imp
统计
The problem was used in the following contest: