Educational Codeforces Round 91 (Rated for Div. 2)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
1380 Educational Codeforces Round 91 (Rated for Div. 2) FINISHED False 9000 142787711 July 12, 2020, 2:45 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 832 ) G Circular Dungeon PROGRAMMING greedy math probabilities

B"You are creating a level for a video game. The level consists of n rooms placed in a circle. The rooms are numbered 1 through n . Each room contains exactly one exit: completing the j -th room allows you to go the (j+1) -th room (and completing the n -th room allows you to go the 1 -st room). You are given the description of the multiset of n chests: the i -th chest has treasure value c_i . Each chest can be of one of two types: The player starts in a random room with each room having an equal probability of being chosen. The players earnings is equal to the total value of treasure chests he'd collected before he lost. You are allowed to choose the order the chests go into the rooms. For each k from 1 to n place the chests into the rooms in such a way that: Please note that for each k the placement is chosen independently. It can be shown that it is in the form of frac{P}{Q} where P and Q are non-negative integers and Q ne 0 . Report the values of P cdot Q^{-1} pmod {998244353} . The first contains a single integer n ( 2 <= n <= 3 cdot 10^5 ) -- the number of rooms and the number of chests. The second line contains n integers c_1, c_2, ... , c_n ( 1 <= c_i <= 10^6 ) -- the treasure values of each chest. Print n integers -- the k -th value should be equal to the minimum possible expected value of players earnings if the chests are placed into the rooms in some order and exactly k of the chests are mimics. It can be shown that it is in the form of frac{P}{Q} where P and Q are non-negative integers and Q ne 0 . Report the values of P cdot Q^{-1} pmod {998244353} . In the first example the exact values of minimum expected values are: frac 1 2 , frac 0 2 . In the second example the exact values of minimum expected values are: frac{132} 8 , frac"...

Tutorials

Educational Codeforces Round 91 Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
86714437 LJC00118 G July 13, 2020, 3:20 a.m. OK GNU C++11 TESTS 16 109 5120000
86709784 Frame233 G July 13, 2020, 12:03 a.m. OK GNU C++11 TESTS 16 139 7475200
86709734 Frame233 G July 13, 2020, 12:01 a.m. OK GNU C++11 TESTS 16 140 6348800
86701289 The.Last.Wizard G July 12, 2020, 7:02 p.m. OK GNU C++11 TESTS 16 155 6246400
86710010 scimoon G July 13, 2020, 12:17 a.m. OK GNU C++11 TESTS 16 171 8704000
86714628 CN_zwang2002 G July 13, 2020, 3:25 a.m. OK GNU C++11 TESTS 16 202 7475200
86689465 Pyqe G July 12, 2020, 4:39 p.m. OK GNU C++11 TESTS 16 218 8704000
86709735 caidzh G July 13, 2020, 12:01 a.m. OK GNU C++11 TESTS 16 280 6553600
86685575 Forever_Pursuit G July 12, 2020, 4:17 p.m. OK GNU C++11 TESTS 16 311 13209600
86712413 YJJ_Konnyaku G July 13, 2020, 2:10 a.m. OK GNU C++11 TESTS 16 343 11161600
86684314 Temirulan G July 12, 2020, 4:10 p.m. OK GNU C++14 TESTS 16 217 8601600
86695315 dlalswp25 G July 12, 2020, 5:24 p.m. OK GNU C++14 TESTS 16 218 8601600
86687712 George1123 G July 12, 2020, 4:28 p.m. OK GNU C++14 TESTS 16 311 6144000
86699303 xb0nS G July 12, 2020, 6:23 p.m. OK GNU C++14 TESTS 16 343 7372800
86711242 rama_pang G July 13, 2020, 1:21 a.m. OK GNU C++14 TESTS 16 343 9318400
86701635 keko37 G July 12, 2020, 7:10 p.m. OK GNU C++14 TESTS 16 390 6144000
86702450 WhaleVomit G July 12, 2020, 7:29 p.m. OK GNU C++14 TESTS 16 483 8499200
86696654 kamer G July 12, 2020, 5:41 p.m. OK GNU C++14 TESTS 16 748 8499200
86688237 LayCurse G July 12, 2020, 4:31 p.m. OK GNU C++17 TESTS 16 171 106803200
86685201 natsugiri G July 12, 2020, 4:15 p.m. OK GNU C++17 TESTS 16 187 6144000
86697342 cookiedoth G July 12, 2020, 5:50 p.m. OK GNU C++17 TESTS 16 202 8601600
86709131 tinca_matei G July 12, 2020, 11:21 p.m. OK GNU C++17 TESTS 16 217 6144000
86693764 solaimanope G July 12, 2020, 5:10 p.m. OK GNU C++17 TESTS 16 218 6144000
86707287 12tqian G July 12, 2020, 9:55 p.m. OK GNU C++17 TESTS 16 218 6348800
86685196 oleh1421 G July 12, 2020, 4:15 p.m. OK GNU C++17 TESTS 16 218 10035200
86697074 Tanmay_21 G July 12, 2020, 5:47 p.m. OK GNU C++17 TESTS 16 233 7372800
86714270 cypherop G July 13, 2020, 3:15 a.m. OK GNU C++17 TESTS 16 234 15155200
86697905 Ronnie007 G July 12, 2020, 6 p.m. OK GNU C++17 TESTS 16 249 7372800
86701098 lightseba G July 12, 2020, 6:58 p.m. OK GNU C++17 (64) TESTS 16 124 11571200
86716739 neal G July 13, 2020, 4:27 a.m. OK GNU C++17 (64) TESTS 16 155 7884800
86677566 Geothermal G July 12, 2020, 3:44 p.m. OK GNU C++17 (64) TESTS 16 155 7884800
86679983 .__. G July 12, 2020, 3:52 p.m. OK GNU C++17 (64) TESTS 16 156 9113600
86710002 wwdd G July 13, 2020, 12:17 a.m. OK GNU C++17 (64) TESTS 16 170 15872000
86693739 Marckess G July 12, 2020, 5:09 p.m. OK GNU C++17 (64) TESTS 16 171 13926400
86713940 timf1089 G July 13, 2020, 3:03 a.m. OK GNU C++17 (64) TESTS 16 186 5529600
86714572 emorgan5289 G July 13, 2020, 3:24 a.m. OK GNU C++17 (64) TESTS 16 186 9113600
86708781 victoragnez G July 12, 2020, 11:01 p.m. OK GNU C++17 (64) TESTS 16 186 10956800
86706153 tugsuu G July 12, 2020, 9:13 p.m. OK GNU C++17 (64) TESTS 16 202 9113600
86691797 uwi G July 12, 2020, 4:56 p.m. OK Java 11 TESTS 16 311 24166400
86718628 AnandOza G July 13, 2020, 5:07 a.m. OK Java 8 TESTS 16 389 28057600
86702098 qlf9 G July 12, 2020, 7:20 p.m. OK Java 8 TESTS 16 436 39424000
86708370 MagentaCobra G July 12, 2020, 10:38 p.m. OK Java 8 TESTS 16 452 39321600
86693171 Tlatoani G July 12, 2020, 5:06 p.m. OK Kotlin TESTS 16 467 49459200
86698838 golions G July 12, 2020, 6:15 p.m. OK Kotlin TESTS 16 592 51712000

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