01:15 0
student
01:15 30:00
0
10:00 0
00:30 0
13:00 3
15:00 0
30:00 0
12:00
14
25:00 0
28:00
4
32:00
2
30:00
3
10:00
0
11:00
0
08:00
5
59:00
1
16:00
2
24:00
0
02:00
1
10:00
1
16:00
2
10:00
2
10:00
5
12:00
1
10:00
0
13:00
0
22:00
2
13:00
4
12:00
0
00:45
0
06:00
1
19:00
14
00:48
2
12:00
1
06:00
3
07:00
7
23:00
6
10:00
12
01:34
0
00:30
2
00:31
0
09:00
13
11:00
5
15:00
0
07:00
32
14:00
0
08:00
0
18:00
8
13:00
12
00:50
4