Attention: The time limit was revised to 5.0 seconds.
The size of the input file does not exceed 50.0 MiB.
It is guaranteed that $\sum n \leq 1.2 \times 10^7$
QOJ.ac
QOJ
Time Limit:
5 s
Memory Limit:
512 MB
# 3079. Joining The Bricks Together
统计
The problem was used in the following contest: