Educational Codeforces Round 180 (Rated for Div. 2)

Solutions are presented as using the least memory and the fastest execution time. It also takes the top 10 most recent solutions from each language. If you want to limit to a specific index, click the "Solved" button and go to that problem.

ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
2112 Educational Codeforces Round 180 (Rated for Div. 2) FINISHED False 7200 25716323 June 23, 2025, 2:35 p.m.

Problems

Solved
Index
Name
Type
Tags
Community Tag
Rating
( 3306 ) E Tree Colorings PROGRAMMING combinatorics dp graphs math trees

Consider a rooted undirected tree. Each vertex can be colored blue, green, or yellow. A coloring is called beautiful if it meets these conditions: the root of the tree is green; if you consider all blue and green vertices , they are reachable from each other without passing through any yellow vertices; if you consider all yellow and green vertices , they are reachable from each other without passing through any blue vertices; You are given an integer (m). Your task is to calculate the minimum number of vertices in a tree with exactly (m) beautiful colorings. The first line contains a single integer ((1 \le t \le 10^5)) — the number of test cases. The only line of each test case contains a single integer (m) ((1 \le m \le 5 \cdot 10^5)). For each test case, print a single integer — the minimum number of vertices in a tree with exactly (m) beautiful colorings. If such a tree does not exist, print (-1). In the following notes, let (g) describe green color, (b) be blue, and (y) be yellow. In the first example, consider a simple tree with just (1) vertex. This tree has exactly (1) beautiful coloring: the root is green. In the second example, consider a simple tree with (2) vertices with a root at the (1)-st vertex. There are exactly (3) beautiful colorings: (g, g), (g, b) and (g, y). In the third example, consider a bamboo tree with (3) vertices with a root at the (1)-st vertex. There are exactly (5) beautiful colorings: (g, g, g), (g, g, b), (g, g, y), (g, b, b) and (g, y, y). In the fifth example, consider a tree with (3) vertices with a root at the (1)-st vertex, and the other (2) vertices connected to it. There are exactly (9) beautiful colorings: (g, g, g), (g, g, b), (g, g, y), (g, b, g), (g, b, b), (g, b, y), (g, y, g), (g, y, b) and (g, y, y).

Tutorials

Educational Codeforces Round 180 — Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
325962922 og.kostya E June 25, 2025, 6:01 a.m. OK C# 10 TESTS 8 109 4812800
325962252 og.kostya E June 25, 2025, 5:54 a.m. OK C# 10 TESTS 8 156 7065600
325962281 og.kostya E June 25, 2025, 5:54 a.m. OK C# 13 TESTS 8 140 5939200
325852100 Cuiyi_SAI E June 24, 2025, 9:27 a.m. OK C++17 (GCC 7-32) TESTS 8 62 2048000
325841399 omarkurde E June 23, 2025, 8:38 p.m. OK C++17 (GCC 7-32) TESTS 8 77 0
325942675 zhlzt E June 25, 2025, 12:29 a.m. OK C++17 (GCC 7-32) TESTS 8 78 2048000
325905516 Cutelhqqq E June 24, 2025, 4:47 p.m. OK C++17 (GCC 7-32) TESTS 8 93 0
325903602 Cutelhqqq E June 24, 2025, 4:34 p.m. OK C++17 (GCC 7-32) TESTS 8 93 0
325855042 He_XY E June 24, 2025, 10:18 a.m. OK C++17 (GCC 7-32) TESTS 8 93 2048000
325845231 antguz E June 23, 2025, 10:01 p.m. OK C++17 (GCC 7-32) TESTS 8 93 2048000
325838402 wikijokiel E June 23, 2025, 7:45 p.m. OK C++17 (GCC 7-32) TESTS 8 93 8089600
325826436 KawakiMeido E June 23, 2025, 5:45 p.m. OK C++17 (GCC 7-32) TESTS 8 108 2048000
325949096 8Conan8 E June 25, 2025, 2:55 a.m. OK C++17 (GCC 7-32) TESTS 8 109 12083200
325944152 propane E June 25, 2025, 1:15 a.m. OK C++20 (GCC 13-64) TESTS 8 62 0
325937355 abstract_nonsense E June 24, 2025, 9:40 p.m. OK C++20 (GCC 13-64) TESTS 8 62 102400
325893081 OmarAli. E June 24, 2025, 3:22 p.m. OK C++20 (GCC 13-64) TESTS 8 62 102400
325833965 Artist04 E June 23, 2025, 6:48 p.m. OK C++20 (GCC 13-64) TESTS 8 62 102400
325833812 NotFound E June 23, 2025, 6:46 p.m. OK C++20 (GCC 13-64) TESTS 8 62 102400
325945943 hanime1 E June 25, 2025, 2:03 a.m. OK C++20 (GCC 13-64) TESTS 8 62 2048000
325894835 FlowerandYou E June 24, 2025, 3:34 p.m. OK C++20 (GCC 13-64) TESTS 8 62 2048000
325894396 Shahod E June 24, 2025, 3:31 p.m. OK C++20 (GCC 13-64) TESTS 8 77 0
325863817 overnap E June 24, 2025, 11:31 a.m. OK C++20 (GCC 13-64) TESTS 8 77 0
325832895 NotFound E June 23, 2025, 6:37 p.m. OK C++20 (GCC 13-64) TESTS 8 77 0
325949924 mekadalibrahem123 E June 25, 2025, 3:07 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 0
325937445 alphax171 E June 24, 2025, 9:43 p.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 2048000
325858718 HasibEvnRiaz E June 24, 2025, 10:54 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 2048000
325858632 NortGlG E June 24, 2025, 10:53 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 2048000
325850194 gqf E June 24, 2025, 12:54 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 2048000
325943891 kaiichen E June 25, 2025, 1:07 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 62 4096000
325851147 jianjianj E June 24, 2025, 1:30 a.m. OK C++23 (GCC 14-64, msys2) TESTS 8 77 0
325823445 FzArK E June 23, 2025, 5:22 p.m. OK C++23 (GCC 14-64, msys2) TESTS 8 77 0
325830973 __ALBION__ E June 23, 2025, 6:20 p.m. OK C++23 (GCC 14-64, msys2) TESTS 8 77 102400
325917967 GlidingNinja_ccn E June 24, 2025, 6:20 p.m. OK C++23 (GCC 14-64, msys2) TESTS 8 77 409600
325831219 dusty.and.rusty E June 23, 2025, 6:22 p.m. OK Java 21 TESTS 8 624 20787200
325844756 ironman263 E June 23, 2025, 9:49 p.m. OK Java 21 TESTS 8 780 819200
325842550 dusty.and.rusty E June 23, 2025, 8:59 p.m. OK Java 21 TESTS 8 1062 43724800
325891123 dusty.and.rusty E June 24, 2025, 3:09 p.m. OK Java 21 TESTS 8 1062 44339200
325951659 man-ray E June 25, 2025, 3:31 a.m. OK Java 21 TESTS 8 2546 202240000
325820928 sahasrad E June 23, 2025, 5:06 p.m. OK Java 21 TESTS 8 3280 220262400
325823412 Akash_Baidya2005 E June 23, 2025, 5:22 p.m. OK Java 8 TESTS 8 1515 2969600
325821078 Akash_Baidya2005 E June 23, 2025, 5:07 p.m. OK Java 8 TESTS 8 1515 2969600
325843205 Sumitsingh7 E June 23, 2025, 9:13 p.m. OK Java 8 TESTS 8 3843 248012800
325895313 kasiru_69 E June 24, 2025, 3:37 p.m. OK Java 8 TESTS 8 3889 201420800
325919871 titia E June 24, 2025, 6:37 p.m. OK PyPy 3-64 TESTS 8 202 12288000
325962613 Mischievius E June 25, 2025, 5:57 a.m. OK PyPy 3-64 TESTS 8 202 12902400
325844830 samchen123 E June 23, 2025, 9:51 p.m. OK PyPy 3-64 TESTS 8 249 16998400
325823590 shash4321 E June 23, 2025, 5:23 p.m. OK PyPy 3-64 TESTS 8 265 20684800
325849787 stan23456 E June 24, 2025, 12:41 a.m. OK PyPy 3-64 TESTS 8 312 15257600
325959322 Om_Singh_ E June 25, 2025, 5:22 a.m. OK PyPy 3-64 TESTS 8 328 29593600
325959539 Om_Singh_ E June 25, 2025, 5:24 a.m. OK PyPy 3-64 TESTS 8 343 30105600
325960992 Om_Singh_ E June 25, 2025, 5:40 a.m. OK PyPy 3-64 TESTS 8 358 31539200
325960703 Om_Singh_ E June 25, 2025, 5:37 a.m. OK PyPy 3-64 TESTS 8 374 31948800
325848637 DeadMan69 E June 24, 2025, midnight OK PyPy 3-64 TESTS 8 483 28364800
325952280 ValeriyShiyan E June 25, 2025, 3:41 a.m. OK Python 3 TESTS 8 578 24883200
325858675 DanielAnker E June 24, 2025, 10:53 a.m. OK Rust 2021 TESTS 8 828 97177600
325920099 DeanMenezes3 E June 24, 2025, 6:39 p.m. OK Rust 2021 TESTS 8 1077 110284800

remove filters

Back to search problems