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ContestId |
Name |
Phase |
Frozen |
Duration (Seconds) |
Relative Time |
Start Time |
|---|---|---|---|---|---|---|
| 2249 | Codeforces Round 1112 (Div. 1) | FINISHED | False | 9000 | 2388314 | July 26, 2026, 2:35 p.m. |
Solved |
Index |
Name |
Type |
Tags |
Community Tag |
Rating |
|---|---|---|---|---|---|---|
| ( 1600 ) | C | Double-Rift Dial | PROGRAMMING | data structures dfs and similar dsu implementation two pointers |
A permutation(^{\text{∗}}) (p) of length (n) is written clockwise on a circular dial. Choose a starting position (s) ((1\le s\le n)) and read one full circle clockwise from (p_s), wrapping around after (p_n). The resulting sequence is () q=p_s,p_{s+1},\ldots,p_n,p_1,\ldots,p_{s-1}, () which also has a length of (n). For any non-empty prefix of this sequence (q_1, q_2, \ldots, q_k) ((k\ge 1)), let (S) be the corresponding set of values, that is, (S=\{q_1, q_2,\ldots, q_k\}). Split (S) into maximal segments of consecutive integers, and we call these segments the blocks of (S). For example, (S=\{1,2,5,7,8,9\}) has (3) blocks : (\{1,2\}), (\{5\}), and (\{7,8,9\}). A starting position (s) is called good if and only if, for every non-empty prefix of (q), the corresponding set (S) has at most (2) blocks . Find the number of good starting positions. (^{\text{∗}})A permutation of length (n) is an array consisting of (n) distinct integers from (1) to (n) in arbitrary order. For example, (2,3,1,5,4) is a permutation, but (1,2,2) is not a permutation ((2) appears twice in the array), and (1,3,4) is also not a permutation ((n=3) but there is (4) in the array). Each test contains multiple test cases. The first line contains the number of test cases (t) ((1 \le t \le 10^4)). The description of the test cases follows. The first line of each test case contains one integer (n) ((1\le n\le 2\cdot 10^5)) — the length of (p). The second line of each test case contains (n) integers (p_1,p_2,\ldots,p_n) ((1\le p_i\le n), all (p_i)-s are distinct) — the elements of (p). It is guaranteed that the sum of (n) over all test cases does not exceed (2\cdot 10^5). For each test case, print one integer — the number of good starting positions. In the first test case, there is only one starti |
| Codeforces Round 1112 (Div. 1, Div. 2) Editorial |
Submission Id |
Author(s) |
Index |
Submitted |
Verdict |
Language |
Test Set |
Tests Passed |
Time taken (ms) |
Memory Consumed (bytes) |
Tags |
Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 384423636 | sronak | C | July 26, 2026, 5:01 p.m. | OK | C# 13 | TESTS | 17 | 671 | 18022400 | ||
| 384423262 | alexlikemath007 | C | July 26, 2026, 5 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 78 | 2560000 | ||
| 384389388 | yinghua_luoxue | C | July 26, 2026, 3:27 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 125 | 2764800 | ||
| 384442504 | therealdoug0986 | C | July 26, 2026, 8:57 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 171 | 5017600 | ||
| 384408827 | zoutong | C | July 26, 2026, 4:10 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 234 | 16076800 | ||
| 384371556 | potato167 | C | July 26, 2026, 3 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 265 | 5939200 | ||
| 384463721 | rabbit_mygo | C | July 27, 2026, 4:44 a.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 281 | 15257600 | ||
| 384422930 | dl2718281 | C | July 26, 2026, 4:59 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 296 | 11264000 | ||
| 384407637 | gwance | C | July 26, 2026, 4:06 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 296 | 14438400 | ||
| 384394785 | JianYuuuuu | C | July 26, 2026, 3:36 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 296 | 14540800 | ||
| 384391734 | quanjun | C | July 26, 2026, 3:31 p.m. | OK | C++17 (GCC 7-32) | TESTS | 17 | 312 | 9625600 | ||
| 384417010 | CHENRUIJIE | C | July 26, 2026, 4:37 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 78 | 2252800 | ||
| 384444066 | Michael533239 | C | July 26, 2026, 9:41 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 78 | 8192000 | ||
| 384389939 | Midhilesh | C | July 26, 2026, 3:28 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 109 | 2764800 | ||
| 384445119 | JeffLegendPower | C | July 26, 2026, 10:16 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 125 | 921600 | ||
| 384427829 | pooty | C | July 26, 2026, 5:33 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 125 | 6041600 | ||
| 384399385 | stateCompressed | C | July 26, 2026, 3:46 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 125 | 13824000 | ||
| 384383652 | AlRntn | C | July 26, 2026, 3:17 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 171 | 15360000 | ||
| 384405461 | Xerxes | C | July 26, 2026, 4 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 187 | 4403200 | ||
| 384418411 | Minzitong | C | July 26, 2026, 4:42 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 187 | 9113600 | ||
| 384404195 | redbirdfly | C | July 26, 2026, 3:57 p.m. | OK | C++20 (GCC 13-64) | TESTS | 17 | 187 | 32051200 | ||
| 384410118 | Dalek_of_Rivia | C | July 26, 2026, 4:14 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 78 | 102400 | ||
| 384401413 | lcyxds | C | July 26, 2026, 3:51 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 125 | 1638400 | ||
| 384414222 | Milmon | C | July 26, 2026, 4:27 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 125 | 12492800 | ||
| 384389334 | ExplodingKonjac | C | July 26, 2026, 3:26 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 140 | 6758400 | ||
| 384399232 | dinohaur | C | July 26, 2026, 3:46 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 140 | 8499200 | ||
| 384388554 | zdc123456 | C | July 26, 2026, 3:25 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 140 | 17612800 | ||
| 384400179 | justin_zed | C | July 26, 2026, 3:48 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 156 | 7065600 | ||
| 384420870 | A_G | C | July 26, 2026, 4:52 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 156 | 9523200 | ||
| 384394905 | socpite | C | July 26, 2026, 3:37 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 156 | 10240000 | ||
| 384460253 | ktts0715 | C | July 27, 2026, 3:55 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 17 | 171 | 5939200 | ||
| 384416844 | pengin_2000 | C | July 26, 2026, 4:36 p.m. | OK | GNU C11 | TESTS | 17 | 109 | 20172800 | ||
| 384393044 | codecrasher_ | C | July 26, 2026, 3:33 p.m. | OK | Go | TESTS | 17 | 203 | 18124800 | ||
| 384380780 | gofrozen21 | C | July 26, 2026, 3:12 p.m. | OK | Java 21 | TESTS | 17 | 375 | 5939200 | ||
| 384403415 | MBBN | C | July 26, 2026, 3:55 p.m. | OK | Java 21 | TESTS | 17 | 843 | 72601600 | ||
| 384388851 | AJ123496 | C | July 26, 2026, 3:26 p.m. | OK | Java 21 | TESTS | 17 | 890 | 5017600 | ||
| 384419016 | nathanballman | C | July 26, 2026, 4:44 p.m. | OK | Java 21 | TESTS | 17 | 1656 | 59289600 | ||
| 384389265 | dark_slayer007 | C | July 26, 2026, 3:26 p.m. | OK | Java 8 | TESTS | 17 | 437 | 2252800 | ||
| 384389833 | Tlatoani | C | July 26, 2026, 3:27 p.m. | OK | Kotlin 2.2 | TESTS | 17 | 796 | 18739200 | ||
| 384386101 | arvindf232 | C | July 26, 2026, 3:21 p.m. | OK | Kotlin 2.2 | TESTS | 17 | 890 | 7680000 | ||
| 384462632 | superbcoder102 | C | July 27, 2026, 4:28 a.m. | OK | PyPy 3-64 | TESTS | 17 | 734 | 33996800 | ||
| 384393798 | trycatchcry | C | July 26, 2026, 3:35 p.m. | OK | Rust 2024 | TESTS | 17 | 296 | 16896000 | ||
| 384388230 | d11maan | C | July 26, 2026, 3:24 p.m. | OK | Rust 2024 | TESTS | 17 | 359 | 8908800 | ||
| 384396776 | DanielAnker | C | July 26, 2026, 3:40 p.m. | OK | Rust 2024 | TESTS | 17 | 468 | 25292800 | ||
| 384422634 | tomek | C | July 26, 2026, 4:57 p.m. | OK | Rust 2024 | TESTS | 17 | 500 | 7782400 | ||
| 384395663 | Egor | C | July 26, 2026, 3:38 p.m. | OK | Rust 2024 | TESTS | 17 | 515 | 6041600 | ||
| 384412875 | cvs-650 | C | July 26, 2026, 4:23 p.m. | OK | Rust 2024 | TESTS | 17 | 531 | 38092800 | ||
| 384397722 | qwerty787788 | C | July 26, 2026, 3:42 p.m. | OK | Rust 2024 | TESTS | 17 | 562 | 18534400 | ||
| 384409742 | darkkcyan | C | July 26, 2026, 4:13 p.m. | OK | Rust 2024 | TESTS | 17 | 859 | 28057600 | ||
| 384407105 | Cyros | C | July 26, 2026, 4:05 p.m. | OK | Scala | TESTS | 17 | 1625 | 116224000 |
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