06:00
0
student
02:00
0
02:00
0
02:00
0
10:00
0
12:00
0
06:00
1
11:00
1
12:00
2
14:00
2
11:00
3
10:00
3
05:00
1
05:00
2
07:00
2
11:00
2
20:00
1
05:00
0
08:00
2
11:00
2
10:00
4
21:00
2
13:00
2
08:00
1
15:00
1
05:00
2
15:00
1
06:00
2
07:00
0