Hello codeforces,

as you may know, the famous book "Looking for a challenge?" is quite beloved by our comunity, given it has really interesting/hard problems and editorials from problem's writer itself.

Recently I got back to my copy, craving to know if I could solve it entirely. On each question statement, the book

1. Ants
2. Hyperclock
3. Fishes
4. Pilots
5. Skiers : https://szkopul.edu.pl/problemset/problem/l2KMMsZLpA66aGrWu-_QVAZI/site/?key=statement
6. Barricades : https://szkopul.edu.pl/problemset/problem/1sX3vqLjiqkpxBNI-sh8UC2m/site/?key=statement
7. Travel Agency : https://szkopul.edu.pl/problemset/problem/ndbJELRNtKF-32lPk7ew3XCV/site/?key=statement
8. Mushrooms : https://szkopul.edu.pl/problemset/problem/KVIxa_im2wGYJX99NB31p_nC/site/?key=statement
9. Sweets : https://szkopul.edu.pl/problemset/problem/cEMM4bdcKN06uikzs9BRSqkz/site/?key=statement
10. Coding of permutations : https://szkopul.edu.pl/problemset/problem/jd9o4lcV64v_ec432zTSoqh8/site/?key=statement
11. Rooks : https://szkopul.edu.pl/problemset/problem/dIejmvqlAbsoU1hkjNbd4KtF/site/?key=statement
12. Monkeys : https://szkopul.edu.pl/problemset/problem/neqccAalHI0t2ieiHEEgQHzy/site/?key=statement
13. Plotter :
14. Termites : https://szkopul.edu.pl/problemset/problem/Wa4p6tM-ZrLBEsLFQF1ZTAZf/site/?key=statement
15. Window : https://szkopul.edu.pl/problemset/problem/PQLssAMfHL5sXao6JYIZSMQq/site/?key=statement
16. Altars : https://szkopul.edu.pl/problemset/problem/4zZWWzI9tb_9FGiIbDgtFPUP/site/?key=statement
17. Axes of Symmetry : https://szkopul.edu.pl/problemset/problem/ETArorvqQVqRUJRa4kx02f8D/site/?key=statement
18. Leonardo Numbers : https://szkopul.edu.pl/problemset/problem/yGC3v6-xidN3ZW6QNlBAFZSU/site/?key=statement
19. Ritual :
20. Questions : https://szkopul.edu.pl/problemset/problem/Xbp5u_lCVviSoMvFVgYHz0gT/site/?key=statement
21. Chocolate : https://szkopul.edu.pl/problemset/problem/PJCf09u_Xp0wg95P-mGX3gtx/site/?key=statement
22. Fibonacci sums : https://szkopul.edu.pl/problemset/problem/98e_K-Vvcg5TnMG4-hXTNsFG/site/?key=statement
23. The search :
24. Hashing :
25. Afternoon tea : https://szkopul.edu.pl/problemset/problem/VbC9pm97qF-UbC1kZLinY4FS/site/?key=statement
26. Kangaroos : https://szkopul.edu.pl/problemset/problem/fWtoXJwTg06b-UddjeFgchFb/site/?key=statement
27. Sums : https://szkopul.edu.pl/problemset/problem/4CirgBfxbj9tIAS2C7DWCCd7/site/?key=statement
28. Superknight : https://szkopul.edu.pl/problemset/problem/a5TLgccUv1fV_VVYCzkYZIeO/site/?key=statement
29. Ice skates : https://szkopul.edu.pl/problemset/problem/EwpbJWZPly_zZ5i4ytg_8fDE/site/?key=statement
30. Termites 2 : https://szkopul.edu.pl/problemset/problem/Wm_52pyH5gyWTdhWJfd_dc3j/site/?key=statement
31. Cave : https://szkopul.edu.pl/problemset/problem/5Z9PRRPP-R90WhmbSY_qHd-1/site/?key=statement
32. Shuffle : https://szkopul.edu.pl/problemset/problem/Hsm0_uXNWotMHqLfp6_jDc0S/site/?key=statement
33. Game of tokens :
34. Straight lines : https://szkopul.edu.pl/problemset/problem/ORLuUwsI4VKHyzusPnWbW90c/site/?key=statement
35. Guilds : https://szkopul.edu.pl/problemset/problem/oTsXNiT3SD45VgVS2zqQWj7F/site/?key=statement
36. Reconstruction of byteland : https://szkopul.edu.pl/problemset/problem/pGW6yPN0P1GMmExqS1SRZfVu/site/?key=statement
37. Army training : https://szkopul.edu.pl/problemset/problem/nXF1qOIv5S88utFPI2V_0gt3/site/?key=statement
38. Riddle : https://szkopul.edu.pl/problemset/problem/W8xspxtNAp3cOxDBA13FA3LK/site/?key=statement
39. Fuel : https://szkopul.edu.pl/problemset/problem/5g0vDW-MvMGHfWQqh56jQKx1/site/?key=statement
40. Ploughing : https://szkopul.edu.pl/problemset/problem/6YiP6JA5U15hY94pLwuHoYPg/site/?key=statement
41. Canoes : https://szkopul.edu.pl/problemset/problem/1ARQAJwDYLzPvU7cE2T5qcQk/site/?key=statement
42. Painter's studio : https://szkopul.edu.pl/problemset/problem/yLYgZJFSxjd-pqbjrUvSCOF7/site/?key=statement
43. Triangles :
44. Triangles 2 : https://szkopul.edu.pl/problemset/problem/tX0rS-7EjatV5bZ8pmijgiHZ/site/?key=statement
45. Circular game : https://szkopul.edu.pl/problemset/problem/X7Ad3z3_4Mg7cdrz2GUUNeC_/site/?key=statement
46. Byteland : https://szkopul.edu.pl/problemset/problem/JXaPu39wQfiZaqlM51zlchez/site/?key=statement
47. Cakes : https://szkopul.edu.pl/problemset/problem/XWoCTR5RfPUYrlXIGPad9u2W/site/?key=statement
48. Building blocks : https://szkopul.edu.pl/problemset/problem/KC7c6nYfAXCbCGszqhIeOGxP/site/?key=statement
49. Matching : https://szkopul.edu.pl/problemset/problem/6b-q_dPI_KRHD3VArapVq7EP/site/?key=statement
50. Party :
51. Dice : https://szkopul.edu.pl/problemset/problem/Xo_ptkltMBz_VOEKGB-2RpzB/site/?key=statement
52. Two parties : https://szkopul.edu.pl/problemset/problem/eC-cABL-jWd4JdZDmfWufeeQ/site/?key=statement
53. Guesswork :