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In a balanced string certain pairs of characters or substrings always appear with the same amount. Often there are additional restrictions that those pairs also have to be ordered. The most common example is a correctly parenthesized string. See also the [palindrome] and [syntax] tags.

7 votes
7 answers
422 views

Decompose string into blocks

Your program's input is a string containing whitespaces, parentheses, and other characters. The string is assumed to be parenthesed correctly, i.e. each right parenthesis matches a unique left parenth …
Ewan Delanoy's user avatar
  • 1,045
9 votes
1 answer
422 views

Gather the trash

You're looking at an avenue, and someone has left the trash out! You need to write a program to help fix the problem, by putting the trash into trashcans. The task The avenue is made up of a string …
Ewan Delanoy's user avatar
  • 1,045