id	lecture time	y
1	1	120	4
2	1	67	2
3	1	13	0
4	1	137	3
5	1	45	1
6	1	28	2
7	1	5	0 
8	1	28	1
9	1	87	3
10	1	12	1
11	1	65	2
12	1	45	0
13	0	26	2
14	0	14	0
15	0	7	0
16	0	44	1
17	0	168	2
18	0	38	0
19	0	21	0
20	0	29	1
21	0	98	3
22	0	11	0
23	0	261	0
24	0	143	1