COS 100: Introduction to Programming

Fall 2019

Kattis

Interested in competitive programming? Want more programming challenges? Kattis has lots of problems that you can try solving! Once you learn about lists, you'll have all the tools necessary to solve almost any problem with a difficulty of 2 or less.

• Create a Kattis account.
• Start with problem hello: just print "Hello World!" to make sure everything is working.
• Then try timeloop: to make sure you can read and deal with input. (See below for details.)
• Try various problems and see what you can solve!
• If you're interested in officially entering competitions, talk to me.

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• One thing to note is that your program isn't being used by a human tester, so you won't be using input() to collect data. Instead, you can grab one line of input at a time using sys.stdin.
• So for instance, if the input is

  hi
  hello
  goodbye
  

  Then the code:

  import sys
  
  for line in sys.stdin:
      print(line)
  

  would loop through the three lines of text one at a time and print them.
• If the input contain numbers, you can use int() or float() to convert the text to numbers, as usual.
• If the input has multiple values on a single line separated by spaces, you can get at each value using stuff we'll learn later. For now, mimic this example.