Codeforces Round 635 (Div. 1)

4 problems from Codeforces Round 635 (Div. 1) (contest 1336), difficulty 1700-3500. 0/4 solutions verified against sample I/O.

4 items

Codeforces Round 635 (Div. 1)

Div. 1 | 4 problems | 0/4 verified | Difficulty 1700-3500 | 13m 54s

# Problem Rating Tags Accepted Time ✓
B Xenia and Colorful Gems 1700 binary-search, greedy, math 12,128 2m 38s
C Kaavi and Magic Spell 2200 dp, strings 4,085 4m 33s
D Yui and Mahjong Set 3200 constructive-algorithms, interactive 529 5m 3s
F Journey 3500 data-structures, divide-and-conquer, graphs 278 1m 40s
Practice › Codeforces Solutions › Codeforces Round 635 (Div. 1) ›

CF 1336D - Yui and Mahjong Set

We are dealing with a hidden multiset of tiles where each tile carries a value from 1 to n. The hidden configuration can be thought of as an array of frequencies a₁, a₂, …, aₙ, where aᵢ is the number of tiles with value i.
codeforces competitive-programming constructive-algorithms interactive Jun 16, 2026
Practice › Codeforces Solutions › Codeforces Round 635 (Div. 1) ›

CF 1336C - Kaavi and Magic Spell

We are given two strings. The first string represents a queue of characters that we will consume from the left. The second string is a target pattern.
codeforces competitive-programming dp strings Jun 16, 2026
Practice › Codeforces Solutions › Codeforces Round 635 (Div. 1) ›

CF 1336F - Journey

There is not enough information to diagnose the algorithm from this sample alone. The failing input is: Expected output: Actual output: From this, we can infer only that: - The input format is a line containing 1 7 followed by a binary string 0000000.
codeforces competitive-programming data-structures divide-and-conquer graphs trees Jun 11, 2026
Practice › Codeforces Solutions › Codeforces Round 635 (Div. 1) ›

CF 1336B - Xenia and Colorful Gems

There is not enough information to diagnose the algorithm from this sample alone. The failing input is: Expected output: Actual output: From this, we can infer only that: - The input format is a line containing 1 7 followed by a binary string 0000000.
codeforces competitive-programming binary-search greedy math sortings two-pointers Jun 11, 2026