Extra spaces in your output may lead to "Wrong Answer".
QOJ.ac
QOJ
Time Limit:
8.0 s
Memory Limit:
1024 MB
Total points:
100
Hackable ✓
# 7015. Rikka with Illuminations
统计
该题目在以下比赛中使用过：
This problem is prepared by
clrs97 .