-
simple and easy:
- drinking water
-
simple but hard:
- converting date system in all images in a folder
- lifting heavy weight
- coding in BrainFuck (has only 4 operations)
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complex but easy:
- solving a quadradic equation ( has considarble amount of steps but once you get it, it's easy )
- coding in Python (sorry)
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complex and hard:
- building a 3D printer