Classical Programming Questions

Question

What are the best classical coding challenges which need rather intuitive or creative thought?
One of which i'm familiar with is replacing two variables without using a 3rd temporary variable.
Do you know any other ones? Please share them here.

Answer 1

Not really classical challenges as such but here are some I came up with :
1. A list of 1000 numbers are entered as a list. A single number is then entered. Your program must see if any two numbers in the list add up to that single number.
2. Yet again, a list of 1000 numbers is entered. Your program must sort this list as quickly as possible without using any keywords that do it for you.
3. Try to make a prime number generator in a few lines as possible, it doesn't matter how quick it is.

Answer 2

if you look for classical programming problems I can recommend - besides Sololearn of course ;) - geeksforgeeks and the Euler Project. This should keep you busy for a couple of years!