33:00
1
student
00:48
2
15:00
18
12:00
0
06:00
1
07:00
7
23:00
3
10:00
11
01:34
0
00:30
2
00:31
0
10:00
1
09:00
12
11:00
1
15:00
0
07:00
32
14:00
0
08:00
0
18:00
8
13:00
12
00:50
4
23:00
6
15:00
4
15:00
0
10:00
14
26:00
0
10:00
0
33:00
0
12:00
1
16:00
0
41:00
18
11:00
0
27:00
3
08:00
0
32:00
0
37:00
17
02:00
2
08:00
24
05:00
0
02:00
0
10:00
0
02:00
0
12:00
5
10:00
1
18:00
5
03:00
0
02:00
0
31:00
2
26:00
0
22:00
0