Problem A
Inspecting Illumination

Problem statistics

#	User	Runtime	Language	Date
1	Patrick Li	0.00 s	C++	2021-02-01 23:30:42
2	Christopher Lin	0.00 s	C++	2021-02-11 00:29:08
3	Nguyễn Thành Minh	0.01 s	C++	2021-02-04 04:34:03

#	User	Runtime	Date
1	Patrick Li	0.00 s	2021-02-01 23:30:42
2	Christopher Lin	0.00 s	2021-02-11 00:29:08
3	Nguyễn Thành Minh	0.01 s	2021-02-04 04:34:03

#	User	Length	Language	Date
1	Christopher Lin	736	C++	2021-02-11 00:29:08
2	Nguyễn Thành Minh	1107	C++	2021-02-04 04:34:03
3	Patrick Li	1480	C++	2021-02-01 23:30:42

#	User	Length	Date
1	Christopher Lin	736	2021-02-11 00:29:08
2	Nguyễn Thành Minh	1107	2021-02-04 04:34:03
3	Patrick Li	1480	2021-02-01 23:30:42