How do I solve programming questions

This file describes a set of jobs with positive and integral weights and lengths. It has the format
[number_of_jobs]
[job_1_weight] [job_1_length]
[job_2_weight] [job_2_length]

10000
8 50
74 59
31 73
45 79
24 10
41 66
93 43
88 4
28 30