Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) Editorial

Revision en4, by Harbour.Space, 2021-07-23 11:29:22

Hope you all enjoyed the problemset! Editorials to problems H and I are not ready yet, we will add them as soon as possible. We apologize for weak pretests and easy problems for top participants.

By the way, solution authors did not necessarily prepare the problems. The solutions were chosen at random.

UPD. Editorials for H and I are ready! Wish you all productive upsolving and high ratings!

1553A - Digits Sum

Idea: bthero Preparation: 244mhq

Tutorial
Solution (kefaa2)

1553B - Reverse String

Idea: Errichto Preparation: Will not be revealed for now because we care for his/their safety.

Tutorial
Solution (BledDest)

1553C - Penalty

Idea: Errichto Preparation: BledDest

Tutorial
Solution (BledDest)

1553D - Backspace

Idea: Adel_SaadEddin, Zaher Preparation: Will not be revealed for now because we care for his/their safety.

Tutorial
Solution (Um_nik)

1553E - Permutation Shift

Idea: bthero, 244mhq Preparation: BledDest

Tutorial
Solution (BledDest)

1553F - Pairwise Modulo

Idea: 244mhq, Errichto Preparation: bthero

Tutorial
Solution (bthero)
Segment tree solution (bthero)

1553G - Common Divisor Graph

Idea: Adel_SaadEddin, Zaher, Errichto Preparation: Errichto

Tutorial
Solution (Errichto)

1553H - XOR and Distance

Idea: 244mhq Preparation: BledDest, mnaeraxr, 244mhq

Tutorial
Solution (BledDest)
Alternative solution (BledDest)

1553I - Stairs

Idea: bthero, 244mhq, BledDest Preparation: BledDest, 244mhq

Tutorial
Solution (BledDest)
Tags #editorial, #cf1553, #dontkillme

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en4 English Harbour.Space 2021-07-23 11:29:22 3035 Tiny change: 'h you all happy upsolving' -> 'h you all productive upsolving'
en3 English Harbour.Space 2021-07-22 22:56:50 2122 Tiny change: ' summary="Solution (B' -> ' summary="Alternative solution (B'
en2 English Harbour.Space 2021-07-22 22:35:06 21493 Tiny change: ':bthero]\nPreparat' -> ':bthero]\n\nPreparat' (published)
en1 English Harbour.Space 2021-07-22 21:58:50 1396 Initial revision (saved to drafts)