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Codeforces Round 940 (Div. 2)
4 days
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Difficulty:
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greedy
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5311
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5414
1718A1
Burenka and Traditions (easy version)
dp
,
greedy
1800
x5450
1630B
Range and Partition
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5479
1732C1
Sheikh (Easy version)
binary search
,
bitmasks
,
greedy
,
two pointers
1800
x5529
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x5609
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5695
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5706
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5753
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5762
1809D
Binary String Sorting
constructive algorithms
,
greedy
1800
x5828
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x5983
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x5986
1304D
Shortest and Longest LIS
constructive algorithms
,
graphs
,
greedy
,
two pointers
1800
x6007
1156B
Ugly Pairs
dfs and similar
,
greedy
,
implementation
,
sortings
,
strings
1800
x6036
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x6054
1705D
Mark and Lightbulbs
combinatorics
,
constructive algorithms
,
greedy
,
math
,
sortings
1800
x6068
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6174
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6218
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6244
1283E
New Year Parties
dp
,
greedy
1800
x6249
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6328
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6342
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6367
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6427
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6469
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6524
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6624
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x6655
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6846
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6907
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6916
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x6968
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7040
1619D
New Year's Problem
binary search
,
greedy
,
sortings
1800
x7202
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7207
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7224
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7241
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7329
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7398
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x7952
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8022
1038D
Slime
dp
,
greedy
,
implementation
1800
x8100
1286A
Garland
dp
,
greedy
,
sortings
1800
x8373
1709C
Recover an RBS
constructive algorithms
,
greedy
,
implementation
,
strings
1800
x8459
1554C
Mikasa
binary search
,
bitmasks
,
greedy
,
implementation
1800
x8472
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8529
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x8753
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8826
1554D
Diane
constructive algorithms
,
greedy
,
strings
1800
x9039
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9316
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x9326
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x9480
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10056
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10828
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x10950
1509C
The Sports Festival
dp
,
greedy
1800
x11712
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x12469
478C
Table Decorations
greedy
1800
x17378
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x319
1211C
Ice Cream
*special problem
,
greedy
,
sortings
1700
x473
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x986
191B
Demonstration
greedy
1700
x992
65B
Harry Potter and the History of Magic
brute force
,
greedy
,
implementation
1700
x1317
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1443
245C
Game with Coins
greedy
1700
x1509
81C
Average Score
greedy
,
math
,
sortings
1700
x1622
213A
Game
dfs and similar
,
greedy
1700
x1683
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1725
161B
Discounts
constructive algorithms
,
greedy
,
sortings
1700
x1920
76D
Plus and xor
dp
,
greedy
,
math
1700
x1983
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2018
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2093
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2137
387C
George and Number
greedy
,
implementation
1700
x2155
596C
Wilbur and Points
combinatorics
,
greedy
,
sortings
1700
x2232
1906M
Triangle Construction
greedy
,
math
1700
x2260
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2303
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2915
1267E
Elections
greedy
1700
x2983
148C
Terse princess
constructive algorithms
,
greedy
1700
x3053
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3080
35D
Animals
dp
,
greedy
1700
x3115
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3193
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3470
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3530
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3535
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3605
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3669
980C
Posterized
games
,
greedy
1700
x3706
1129A1
Toy Train (Simplified)
brute force
,
greedy
1700
x3758
960C
Subsequence Counting
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1700
x3804
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3829
449A
Jzzhu and Chocolate
greedy
,
math
1700
x3863
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x3932
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3936
978G
Petya's Exams
greedy
,
implementation
,
sortings
1700
x4179
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4310
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4345
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4378
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