Codeforces Round 1040 (Div. 1)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
2129 Codeforces Round 1040 (Div. 1) FINISHED False 10800 22519484 July 31, 2025, 2:35 p.m.

Problems

Solved
Index
Name
Type
Tags
Community Tag
Rating
( 129 ) F1 Top-K Tracker (Easy Version) PROGRAMMING interactive

This is an interactive problem. This is the easy version of the problem. The only difference is that (n \le 845) in this version. You can make hacks only if all versions of the problem are solved. There is a hidden permutation (p), which is a permutation of (\{1,2,\ldots,n\}). Let (pos_i) denote the position of the value (i) in (p), i.e., (pos_{p_i} = i). To find this permutation, you can ask four types of queries: "(1\ m\ i_1\ i_2\ \ldots\ i_m)" ((1 \leq m \leq n), (i_1,\ i_2,\ \ldots,\ i_m) must be distinct). Let (k = \min(60, m)). The jury will return the top (k) largest number(s) in (p_{i_1}, p_{i_2}, \ldots, p_{i_m}) in increasing order. "(2\ m\ i_1\ i_2\ \ldots\ i_m)" ((1 \leq m \leq n), (i_1,\ i_2,\ \ldots,\ i_m) must be distinct). Let (k = \min(60, m)). The jury will return the top (k) largest number(s) in (pos_{i_1}, pos_{i_2}, \ldots, pos_{i_m}) in increasing order. "(3\ m\ i_1\ i_2\ ...\ i_m)" ((1 \leq m \leq n), (i_1,\ i_2,\ ...,\ i_m) must be distinct). Let (k = \min(300, m)). The jury will return the top (k) largest number(s) in (p_{i_1}, p_{i_2}, ..., p_{i_m}) in increasing order. "(4\ m\ i_1\ i_2\ \ldots\ i_m)" ((1 \leq m \leq n), (i_1,\ i_2,\ \ldots,\ i_m) must be distinct). Let (k = \min(300, m)). The jury will return the top (k) largest number(s) in (pos_{i_1}, pos_{i_2}, \ldots, pos_{i_m}) in increasing order. Let (c_i) be the usage count of queries of type (i) ((1 \le i \le 4)). Your query count must satisfy the following constraints: (c_1+c_2+c_3+c_4 \le 30.) (c_3+c_4 \le 1.) Each test contains multiple test cases. The first line contains the number of test cases (t) ((1 \le t \le 40)). The description of the test cases follows. The first line of each test case contains one integer (n) ((2 \le n \le 845)). At this moment, the permutation (p) is chosen. The interacto

Tutorials

Codeforces Round 1040 (Div. 1, Div. 2) Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
331866596 re-wa-tl-ok F1 July 31, 2025, 8:19 p.m. OK C++20 (GCC 13-64) TESTS 32 140 102400
331892790 qiuzx F1 Aug. 1, 2025, 3:20 a.m. OK C++20 (GCC 13-64) TESTS 32 233 102400
331855152 cn449 F1 July 31, 2025, 5:33 p.m. OK C++20 (GCC 13-64) TESTS 32 1171 102400
331890703 adam01 F1 Aug. 1, 2025, 2:56 a.m. OK C++23 (GCC 14-64, msys2) TESTS 32 155 204800
331844921 ksun48 F1 July 31, 2025, 5:06 p.m. OK C++23 (GCC 14-64, msys2) TESTS 32 171 102400
331830279 Kevin114514 F1 July 31, 2025, 4:29 p.m. OK C++23 (GCC 14-64, msys2) TESTS 32 171 102400
331824405 jiangly F1 July 31, 2025, 4:16 p.m. OK C++23 (GCC 14-64, msys2) TESTS 32 171 102400
331842629 ecnerwala F1 July 31, 2025, 5 p.m. OK C++23 (GCC 14-64, msys2) TESTS 32 186 102400
331784978 ainta F1 July 31, 2025, 3:12 p.m. OK C++23 (GCC 14-64, msys2) TESTS 32 233 204800
331851835 dyppp F1 July 31, 2025, 5:25 p.m. OK PyPy 3-64 TESTS 32 452 10547200

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