Archive I
- https://community.topcoder.com/stat?c=problem_statement&pm=13184&rd=15978
- https://community.topcoder.com/stat?c=problem_statement&pm=13185&rd=15978
- https://community.topcoder.com/stat?c=problem_statement&pm=13060&rd=15996
- https://community.topcoder.com/stat?c=problem_statement&pm=13235&rd=16016
- https://community.topcoder.com/stat?c=problem_statement&pm=11897&rd=16050
- https://community.topcoder.com/stat?c=problem_statement&pm=13369&rd=16058
Archive II
- https://community.topcoder.com/stat?c=problem_statement&pm=13515&rd=16187
- https://community.topcoder.com/stat?c=problem_statement&pm=13476&rd=16187
- https://community.topcoder.com/stat?c=problem_statement&pm=13437&rd=16188
- https://community.topcoder.com/stat?c=problem_statement&pm=13351&rd=16188
- https://community.topcoder.com/stat?c=problem_statement&pm=13440&rd=16188
- https://szkopul.edu.pl/problemset/problem/nJHEjFet-7htnz7WLJQaarch/site/
- https://szkopul.edu.pl/problemset/problem/b_sGX-7h6Tgq8_Qr6YCyIapf/site/
Archive III
- https://community.topcoder.com/stat?c=problem_statement&pm=13514&rd=16189
- https://community.topcoder.com/stat?c=problem_statement&pm=13444&rd=16189
- https://community.topcoder.com/stat?c=problem_statement&pm=13539&rd=16189
- https://community.topcoder.com/stat?c=problem_statement&pm=13350&rd=16190
- https://community.topcoder.com/stat?c=problem_statement&pm=13439&rd=16190
- https://community.topcoder.com/stat?c=problem_statement&pm=13460&rd=16190
Archive IV
- https://community.topcoder.com/stat?c=problem_statement&pm=13365&rd=16082
- https://community.topcoder.com/stat?c=problem_statement&pm=13328&rd=16084
- https://official.contest.yandex.ru/opencupXVI/contest/1545/problems/C/
- https://official.contest.yandex.ru/opencupXVI/contest/1545/problems/E/
- https://official.contest.yandex.ru/opencupXVI/contest/1614/problems/C/
- https://official.contest.yandex.ru/opencupXVI/contest/1758/problems/H/
Archive V
- https://community.topcoder.com/stat?c=problem_statement&pm=13579&rd=16314
- https://community.topcoder.com/stat?c=problem_statement&pm=13640&rd=16316
- https://community.topcoder.com/stat?c=problem_statement&pm=13692&rd=16318
- https://official.contest.yandex.ru/opencupXVI/contest/1780/problems/6/
- https://official.contest.yandex.ru/opencupXVI/contest/1780/problems/9/
- https://official.contest.yandex.ru/opencupXVI/contest/1780/problems/12/
Archive VI
- https://community.topcoder.com/stat?c=problem_statement&pm=13893&rd=16512
- https://community.topcoder.com/stat?c=problem_statement&pm=13867&rd=16513
- https://official.contest.yandex.ru/opencupXVI/contest/1967/problems/B/
- https://official.contest.yandex.ru/opencupXVI/contest/1967/problems/C/
- https://official.contest.yandex.ru/opencupXVI/contest/1967/problems/I/
- http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=010283 B
- http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=010283 J
Archive VII
- https://community.topcoder.com/stat?c=problem_statement&pm=13908&rd=16514
- https://community.topcoder.com/stat?c=problem_statement&pm=13767&rd=16515
- https://szkopul.edu.pl/problemset/problem/aNCNJuanmwzxsh9IGKoZO0an/site/
- https://szkopul.edu.pl/problemset/problem/GPXVTHCLj6NDj4-V2sk2oYCH/site/
- https://szkopul.edu.pl/problemset/problem/NizsIjXQOb0rjNwW0HiKU3lF/site/
- https://timus.online/problem.aspx?space=1&num=2049
Archive VIII
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/A/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/C/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/D/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/E/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/G/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/H/
- https://official.contest.yandex.ru/opencupXVI/contest/2192/problems/I/
Archive IX
- https://community.topcoder.com/stat?c=problem_statement&pm=13895&rd=16547
- https://community.topcoder.com/stat?c=problem_statement&pm=13792&rd=16548
- https://community.topcoder.com/stat?c=problem_statement&pm=13945&rd=16549
- https://szkopul.edu.pl/problemset/problem/bBm9TCQVRuRuqbCjyJqPjUqz/site/
- https://szkopul.edu.pl/problemset/problem/YVFMirGOuoX4ANxy5dAPrPnA/site/
- https://szkopul.edu.pl/problemset/problem/0BlOZUhgNosJvUntl93Z4q_t/site/
Archive X
- https://community.topcoder.com/stat?c=problem_statement&pm=13891&rd=16550
- https://codeforces.com/group/Uo1lq8ZyWf/contest/219055/problem/A
- https://codeforces.com/group/Uo1lq8ZyWf/contest/219055/problem/C
- https://official.contest.yandex.ru/opencupXVI/contest/2235/problems/B/
- https://official.contest.yandex.ru/opencupXVI/contest/2235/problems/G/
- https://official.contest.yandex.ru/opencupXVI/contest/2235/problems/K/