05:00
40
student
21:00
7
02:00
3
06:00
4
01:27
23
11:00
1
11:00
4
24:00
2
02:00
1
03:00
2
04:00
4
07:00
5
35:00
5
15:00
2
08:00
1
11:00
9
06:00 3
08:00 2
12:00 0
05:00
1
05:00
0
18:00 0
05:00
5
16:00
0
05:00 0
08:00 1
10:00
1
05:00
21
09:00
10
40:00
3