Bob loves foreign languages and wants to plan his course schedule for the following years. He is interested in the following nine language courses: LA15, LA16, LA22, LA31, LA32, LA126, LA127, LA141, and LA169. The course prerequisites are: * LA15: (none) * LA16: LA15 * LA22: (none) * LA31: LA15 * LA32: LA16, LA31 * LA126: LA22, LA32 * LA127: LA16 * LA141: LA22, LA16 * LA169: LA32

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Exercise # 3: Course Schedule
Bob loves foreign languages and wants to plan his course schedule for the
following years.
He is interested in the following nine language courses: LA15, LA16, LA22, LA31,
LA32, LA126, LA127, LA141, and LA169.
The course prerequisites are:
* LA15: (none)
* LA16: LA15
* LA22: (none)
* LA31: LA15
* LA32: LA16, LA31
* LA126: LA22, LA32
* LA127: LA16
* LA141: LA22, LA16
* LA169: LA32
In what order can Bob take these courses, respecting the prerequisites?
Example 1:
Input
Output
List of Courses & Course Pre-Requisites
LA15, LA22, LA16, L31, L32, LA169, LA126, LA127, LA141
Transcribed Image Text:Exercise # 3: Course Schedule Bob loves foreign languages and wants to plan his course schedule for the following years. He is interested in the following nine language courses: LA15, LA16, LA22, LA31, LA32, LA126, LA127, LA141, and LA169. The course prerequisites are: * LA15: (none) * LA16: LA15 * LA22: (none) * LA31: LA15 * LA32: LA16, LA31 * LA126: LA22, LA32 * LA127: LA16 * LA141: LA22, LA16 * LA169: LA32 In what order can Bob take these courses, respecting the prerequisites? Example 1: Input Output List of Courses & Course Pre-Requisites LA15, LA22, LA16, L31, L32, LA169, LA126, LA127, LA141
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