Extra problem is any program you compile and run from the textbook and/or from the lecture, or you did while studying online or while practicing.
Usually no detailed instructions for extra programs. The student can design the program and test cases freely and add additional functionality to the main program.
Each extra should be under the root with a folder name extra_m_w_n. The order is important (m means the month when the extra is given, should between 8-11 for fall semester; 1-5 for spring semester. w means the week of the extra was given, should between 1-5. n means the number of the extra, if only one extra was given in that week, use 1, if two were given, use 1, 2, like extra_2_1_1 and extra_2_1_2, n should between 1-5)
Extras will not be included in the grading system; however, they help boost your grade if ever your total grade is in the upper part of a grade range.
At the end of the semester, we will run a script to verify all submissions. Be careful if the name is not correct you will get a zero.