ID NAME QUALITY USERS ACC % DIFFICULTY C I
28308 Ada and Spring Cleaning   47 812
18
17
32577 Ada and Terramorphing   10 145
31
23
37420 Anti Hash   1 26
34
34
40643 The Revenge Of Anti Hash   1 1
34
34
36671 Bipartite Permutation (Hard)   5 51
29
31
36946 March Of The King   2 8
42
42
40148 Distinct Cyclings   4
34
34
29 Hash it!   13 2916
15
8
36667 Solution to all the problems   11 126
16
11
17150 Palin Square   6 89
21
30
27498 Votka and String   3 67
21
12

#hashing

The problem involves cryptographic hash function, checksum or the like

https://en.wikipedia.org/wiki/Hash_function https://en.wikipedia.org/wiki/Cryptographic_hash_function https://en.wikipedia.org/wiki/Checksum https://en.wikipedia.org/wiki/Hash_table