Job Scheduling

You are given a list of job start and end times (as pairs of integers) and a target duration. Write a function to determine if there is a job whose duration (end time - start time) is exactly equal to the target duration. Return the index of the first job that meets this condition, or -1 if none exists. Input Format: A single line containing space-separated pairs of integers (start and end times). The last integer will be the target duration. Each job is represented by two integers: start time and end time. Output Format: The index of the job that matches the target duration, or -1 if no such job exists. Example: Input: 0 3 2 5 4 7 8 10 12 17 4 Output: 2