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
The ABCD Murderer#9747
Very hard
ABB#9759
Medium
K==S#9766
Very hard
Ponk Warshall#9767
Very easy
Omar plays a game#9792
Very easy
T6. Less often than others#10078
Very easy
Mad scientist#10118
Medium
Bad troubles at ACM ICPC#10199
Very easy
Where Am I?#10285
Very easy
Cool substring#10360
Medium
Subsequence#10465
Medium
Standing Out from the Herd#10518
Very hard
Secret Cow Code#10549
Medium
Block Game#10557
Easy
Script#10646
Medium
Sum of digits#10801
Very easy
Another ICPC String Problem#10825
Very hard
ICPC and Typos#10828
Very easy
TF Problem#10941
Easy
File and worker#10998
Medium