Floor #1
Surveillance is possible.

Floor #2
Surveillance is impossible.

Floor #3
Surveillance is possible.

Floor #4
Surveillance is impossible.

Floor #5
Surveillance is impossible.

Floor #6
Surveillance is impossible.

Floor #7
Surveillance is impossible.

Floor #8
Surveillance is impossible.

Floor #9
Surveillance is impossible.

Floor #10
Surveillance is impossible.

Floor #11
Surveillance is impossible.

Floor #12
Surveillance is impossible.

Floor #13
Surveillance is impossible.

Floor #14
Surveillance is impossible.

Floor #15
Surveillance is impossible.

Floor #16
Surveillance is impossible.

Floor #17
Surveillance is impossible.

Floor #18
Surveillance is impossible.

Floor #19
Surveillance is impossible.

Floor #20
Surveillance is impossible.

Floor #21
Surveillance is impossible.

Floor #22
Surveillance is possible.

Floor #23
Surveillance is possible.

Floor #24
Surveillance is possible.

Floor #25
Surveillance is possible.

Floor #26
Surveillance is possible.

Floor #27
Surveillance is possible.

Floor #28
Surveillance is possible.

Floor #29
Surveillance is possible.

Floor #30
Surveillance is possible.

Floor #31
Surveillance is possible.

Floor #32
Surveillance is possible.

Floor #33
Surveillance is possible.

Floor #34
Surveillance is possible.

Floor #35
Surveillance is possible.

Floor #36
Surveillance is possible.

Floor #37
Surveillance is possible.

Floor #38
Surveillance is possible.

Floor #39
Surveillance is possible.

Floor #40
Surveillance is possible.

Floor #41
Surveillance is possible.

Floor #42
Surveillance is possible.

Floor #43
Surveillance is possible.

Floor #44
Surveillance is possible.

Floor #45
Surveillance is possible.

Floor #46
Surveillance is possible.

Floor #47
Surveillance is possible.

Floor #48
Surveillance is possible.

Floor #49
Surveillance is possible.

Floor #50
Surveillance is possible.

Floor #51
Surveillance is possible.

Floor #52
Surveillance is possible.

Floor #53
Surveillance is possible.

Floor #54
Surveillance is possible.

Floor #55
Surveillance is possible.

Floor #56
Surveillance is possible.

Floor #57
Surveillance is possible.

Floor #58
Surveillance is possible.

Floor #59
Surveillance is possible.

Floor #60
Surveillance is possible.

Floor #61
Surveillance is possible.

Floor #62
Surveillance is possible.

Floor #63
Surveillance is possible.

Floor #64
Surveillance is possible.

Floor #65
Surveillance is possible.

Floor #66
Surveillance is possible.

Floor #67
Surveillance is possible.

Floor #68
Surveillance is possible.

Floor #69
Surveillance is possible.

Floor #70
Surveillance is possible.

Floor #71
Surveillance is possible.

Floor #72
Surveillance is impossible.

Floor #73
Surveillance is impossible.

Floor #74
Surveillance is possible.

Floor #75
Surveillance is possible.

Floor #76
Surveillance is impossible.

Floor #77
Surveillance is impossible.