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Before contest
Codeforces Round 941 (Div. 1)
12:29:10
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
12:29:10
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→ Filter Problems
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
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4490
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x16993
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14672
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x23542
1419C
Killjoy
greedy
,
implementation
,
math
1500
x14877
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x15939
1419A
Digit Game
games
,
greedy
,
implementation
900
x19242
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18081
1418B
Negative Prefixes
greedy
,
sortings
1300
x16266
1417B
Two Arrays
greedy
,
math
,
sortings
1100
x14318
1417A
Copy-paste
greedy
,
math
800
x18037
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x363
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x268
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4162
1416B
Make Them Equal
constructive algorithms
,
greedy
,
math
2000
x5894
1415E
New Game Plus!
constructive algorithms
,
greedy
,
math
2200
x2571
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x11994
1413E
Solo mid Oracle
greedy
,
math
,
ternary search
2100
x1905
1413D
Shurikens
data structures
,
greedy
,
implementation
1700
x6327
1411F
The Thorny Path
greedy
,
math
3000
x319
1411E
Poman Numbers
bitmasks
,
greedy
,
math
,
strings
2300
x1553
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x2423
1409D
Decrease the Sum of Digits
greedy
,
math
1500
x18640
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28200
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62282
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x350
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1874
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9750
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1599
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16665
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3362
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22009
1406A
Subset Mex
greedy
,
implementation
,
math
900
x20915
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2484
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8845
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x20727
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x5000
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16711
1400B
RPG Protagonist
brute force
,
greedy
,
math
1700
x10825
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2208
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5672
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17632
1399C
Boats Competition
brute force
,
greedy
,
two pointers
1200
x27701
1399B
Gifts Fixing
greedy
800
x42294
1399A
Remove Smallest
greedy
,
sortings
800
x62495
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1066
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2170
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x10975
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24043
1397A
Juggling Letters
greedy
,
strings
800
x28092
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2376
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10850
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x14942
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13491
1394D
Boboniu and Jianghu
dp
,
greedy
,
sortings
,
trees
2800
x804
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6445
1393C
Pinkie Pie Eats Patty-cakes
constructive algorithms
,
greedy
,
math
,
sortings
1700
x10250
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16231
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20203
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1939
1392D
Omkar and Bed Wars
dp
,
greedy
1700
x8430
1392C
Omkar and Waterslide
greedy
,
implementation
1200
x18305
1392A
Omkar and Password
greedy
,
math
800
x20139
1391E
Pairs of Pairs
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2600
x1430
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4921
1391B
Fix You
brute force
,
greedy
,
implementation
800
x25985
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4021
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18323
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x15762
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38227
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6118
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9332
1388B
Captain Flint and a Long Voyage
greedy
,
math
1000
x21878
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24526
1387B1
Village (Minimum)
*special problem
,
dp
,
greedy
,
trees
2100
x1306
1385F
Removing Leaves
data structures
,
greedy
,
implementation
,
trees
2300
x2243
1385C
Make It Good
greedy
1200
x26114
1385B
Restore the Permutation by Merger
greedy
800
x36232
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2440
1384B1
Koa and the Beach (Easy Version)
brute force
,
dp
,
greedy
1900
x3833
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x18364
1383D
Rearrange
brute force
,
constructive algorithms
,
graphs
,
greedy
,
sortings
2800
x639
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4754
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10226
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x446
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1388
1380G
Circular Dungeon
greedy
,
math
,
probabilities
2600
x763
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4615
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19854
1380B
Universal Solution
greedy
1400
x14211
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5399
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x2764
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20403
1375B
Neighbor Grid
constructive algorithms
,
greedy
1200
x16907
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x897
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13503
1374C
Move Brackets
greedy
,
strings
1000
x43219
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x758
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1618
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2691
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