Three columns inside log file generated by single thread CPU, assuming input is Entry(String jobName, boolean start, int timeStamp), output is HashMap<String, List>

write a parse function to parse log file. Please read these two examples below very carefully. This problem is more complicated than I think !

job (String) start/end (boolean) timestamp (Integer)
f1 true 1
f1 true 2
f2 true 4
f2 false 8
f1 false 16
f1 false 32
f3 true 64
f3 false 128

output: f1: [1,4] [8,32]
f2: [4,8]
f3: [64,128}

Another example:
f1 true 0
f2 true 2
f1 true 5
f1 false 7
f2 false 10
f3 true 11
f3 false 12
f1 false 15
f4 true 16
f4 false 19

Output:
f1: [0,2], [5, 7], [10, 11], [12 15]
f2: [2,5], [7, 10]
f3: [11, 12]
f4: [16, 19]