Instructor office hours (North 232/LSRC D106): 

Monday: 2-3pm North 232
Tuesday: 3-4pm LSRC D106
Wednesday: 4-5pm  North 232
Thursday:  5-6pm North 232

North is the red brick building right behind LSRC D https://maps.app.goo.gl/sE6gi9ydJ8ekYJSQA

Office hours are a resource to come clarify your understanding on concepts covered in class, ask questions about specific homework problems, review the feedback you've received on a submitted assignment, or seek advice about CS at Duke or anything in particular.