Strings
Problems on strings, including searching for a substring, palindromes, anagrams, comparing and sorting strings, parsing and transforming text, counting characters and words, and string periods.
Narrower problem sets are under Prefix function, Z-function, Hashing and String suffix structures.
Problems
Substrings#2356
Medium
Word Game#2410
Easy
High Score#2451
Very easy
Winnie-the-Pooh's Anniversary#2459
Very easy
Suffix path#2460
Easy
Censorship#2461
Easy
Period of a string#2463
Very easy
Viruses#2466
Very easy
KINA is not abbreviation#2467
Very easy
Parentheses Balance#2479
Very easy
Fibonacci strings#2524
Very easy
Fibonacci String#2525
Very easy
Binary Fibonacci String (BFS)#2527
Very easy
Chorus#2539
Very easy
Form guide#2542
Easy
Roman numerals#2552
Very hard