10:00
0
roommate
10:00 
12:00
2
10:00
0
11:00
2
13:00
1
12:00
0
12:00
0
30:00
0
10:00
0
15:00
0
05:00
0
14:00
0
10:00
1
10:00
0
11:00
0
12:00
0
15:00
0
15:00
0
16:00
0
16:00
0