24:00
0
student
05:00
2
21:00
2
06:00
0
06:00
0
06:00
1
16:00
4
13:00
2
12:00
1
15:00
2
15:00
3
13:00
1
14:00
2
06:00
0
05:00
3
12:00
0
11:00
2
08:00
2
08:00
1
00:55
0