Codeforces Round 625 (Div. 1, based on Technocup 2020 Final Round)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
1320 Codeforces Round 625 (Div. 1, based on Technocup 2020 Final Round) FINISHED False 7200 154284311 March 1, 2020, 1:15 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 870 ) E Treeland and Viruses PROGRAMMING shortest paths trees

B'There are n cities in Treeland connected with n - 1 bidirectional roads in such that a way that any city is reachable from any other; in other words, the graph of cities and roads is a tree. Treeland is preparing for a seasonal virus epidemic, and currently, they are trying to evaluate different infection scenarios. In each scenario, several cities are initially infected with different virus species. Suppose that there are k_i virus species in the i -th scenario. Let us denote v_j the initial city for the virus j , and s_j the propagation speed of the virus j . The spread of the viruses happens in turns: first virus 1 spreads, followed by virus 2 , and so on. After virus k_i spreads, the process starts again from virus 1 . A spread turn of virus j proceeds as follows. For each city x not infected with any virus at the start of the turn, at the end of the turn it becomes infected with virus j if and only if there is such a city y that: Once a city is infected with a virus, it stays infected indefinitely and can not be infected with any other virus. The spread stops once all cities are infected. You need to process q independent scenarios. Each scenario is described by k_i virus species and m_i important cities. For each important city determine which the virus it will be infected by in the end. The first line contains a single integer n ( 1 <= q n <= q 2 cdot 10^5 ) -- the number of cities in Treeland. The following n - 1 lines describe the roads. The i -th of these lines contains two integers x_i and y_i ( 1 <= q x_i, y_i <= q n ) -- indices of cities connecting by the i -th road. It is guaranteed that the given graph of cities and roads is a tree. The next line contains a single integer q ( 1 <= q q <= q 2 cdot 10^5 ) -- the number of infection scenarios. q scenario descriptions foll'...

Tutorials

Codeforces Round #625 Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
72200502 Lagoon_ E March 1, 2020, 3:07 p.m. OK GNU C++11 TESTS 28 343 68198400
72197732 Itst E March 1, 2020, 2:56 p.m. OK GNU C++11 TESTS 28 404 34508800
72194782 cjy2003 E March 1, 2020, 2:43 p.m. OK GNU C++11 TESTS 28 499 35532800
72195289 WZYYN E March 1, 2020, 2:45 p.m. OK GNU C++11 TESTS 28 499 35737600
72207421 wzp666 E March 1, 2020, 5:10 p.m. OK GNU C++11 TESTS 28 514 44851200
72198992 EricHuang2003 E March 1, 2020, 3:01 p.m. OK GNU C++11 TESTS 28 545 46796800
72198569 CrescentRose E March 1, 2020, 2:59 p.m. OK GNU C++11 TESTS 28 655 38195200
72201233 cuizhuyefei E March 1, 2020, 3:10 p.m. OK GNU C++11 TESTS 28 966 89804800
72191679 jijiang E March 1, 2020, 2:30 p.m. OK GNU C++14 TESTS 28 483 60416000
72216889 Devil E March 1, 2020, 8:50 p.m. OK GNU C++14 TESTS 28 576 66969600
72216802 Devil E March 1, 2020, 8:47 p.m. OK GNU C++14 TESTS 28 592 67072000
72217016 Devil E March 1, 2020, 8:54 p.m. OK GNU C++14 TESTS 28 608 66969600
72196864 Jayce132 E March 1, 2020, 2:52 p.m. OK GNU C++14 TESTS 28 639 93900800
72216987 Devil E March 1, 2020, 8:53 p.m. OK GNU C++14 TESTS 28 702 66969600
72200348 lllllllllllllllllllllll E March 1, 2020, 3:07 p.m. OK GNU C++14 TESTS 28 733 46080000
72206611 Nson E March 1, 2020, 4:56 p.m. OK GNU C++14 TESTS 28 779 122265600
72206761 Nson E March 1, 2020, 4:58 p.m. OK GNU C++14 TESTS 28 794 78950400
72211844 860579 E March 1, 2020, 6:41 p.m. OK GNU C++14 TESTS 28 795 74956800
72195901 skip2004 E March 1, 2020, 2:48 p.m. OK GNU C++17 TESTS 28 546 37376000
72206856 wooookje E March 1, 2020, 5 p.m. OK GNU C++17 TESTS 28 561 44236800
72200353 aid E March 1, 2020, 3:07 p.m. OK GNU C++17 TESTS 28 576 39628800
72207304 neal E March 1, 2020, 5:08 p.m. OK GNU C++17 TESTS 28 654 65843200
72205904 neal E March 1, 2020, 4:45 p.m. OK GNU C++17 TESTS 28 655 65843200
72192473 Radewoosh E March 1, 2020, 2:33 p.m. OK GNU C++17 TESTS 28 655 82944000
72200456 gtrhetr E March 1, 2020, 3:07 p.m. OK GNU C++17 TESTS 28 685 45260800
72204965 chemthan E March 1, 2020, 4:35 p.m. OK GNU C++17 TESTS 28 685 59494400
72207256 Benq E March 1, 2020, 5:07 p.m. OK GNU C++17 TESTS 28 685 69120000
72207354 Benq E March 1, 2020, 5:09 p.m. OK GNU C++17 TESTS 28 686 69120000
72205711 cwise E March 1, 2020, 4:42 p.m. OK Java 8 TESTS 28 1497 200908800

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