Write an algorithm and draw a flowchart to determine a number whether it is positive or negative

Which of these is most responsible for differences between the twentieth century to the twenty-first century?

Write a fragment of code that reads in strings from standard input, until end-of-file and prints to standard output the largest value. you may assume there is at least one value. (cascading/streaming logic, basic string processing)

In what way is your social media footprint related to your digital id