Two Homework Problems

August 21, 2015

I can see from my statistics that the new academic year is beginning. Again, as in a previous exercise, in the spirit of helping programming students who are just starting a new school year, we have two typical homework problems:

1. Given an array of positive integers, find the inflection point where the total of the integers before the inflection point and the total of the integers after the inflection point are least different. For instance, given the array [3, 7, 9, 8, 2, 5, 6], the inflection point is between the 9 and 8, which leaves a total of 19 before the inflection point and 21 after, a difference of 2.

2. Write a program that reads a file from disk and writes the last n lines of the file, where n is an input parameter.

Your task is to write programs to solve these problems. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.


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