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Before contest
Codeforces Round 941 (Div. 1)
32:24:27
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
32:24:27
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→ Filter Problems
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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
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x268
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x268
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x269
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x270
543E
Listening to Music
constructive algorithms
,
data structures
3200
x276
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x278
1214G
Feeling Good
bitmasks
,
data structures
3200
x279
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x290
1037G
A Game on Strings
games
3200
x295
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x296
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x302
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x302
494E
Sharti
data structures
,
games
3200
x302
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x306
1672G
Cross Xor
constructive algorithms
,
graphs
,
math
,
matrices
3200
x313
1383F
Special Edges
flows
,
graphs
3200
x318
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x319
1598G
The Sum of Good Numbers
hashing
,
math
,
string suffix structures
,
strings
3200
x323
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x326
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x338
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x346
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x363
1746E2
Joking (Hard Version)
dp
,
interactive
3200
x364
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x365
1209G2
Into Blocks (hard version)
data structures
3200
x376
1648E
Air Reform
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
implementation
,
trees
3200
x383
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x383
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x386
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x395
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x396
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x396
1603E
A Perfect Problem
combinatorics
,
dp
,
math
3200
x398
1523G
Try Booking
data structures
,
divide and conquer
3200
x401
1091H
New Year and the Tricolore Recreation
games
3200
x401
840E
In a Trap
trees
3200
x432
1517F
Reunion
combinatorics
,
dp
,
trees
3200
x435
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x439
613E
Puzzle Lover
dp
,
hashing
,
strings
3200
x453
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x456
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x457
1149E
Election Promises
games
,
graphs
3200
x465
1268D
Invertation in Tournament
brute force
,
divide and conquer
,
graphs
,
math
3200
x480
1142E
Pink Floyd
graphs
,
interactive
3200
x480
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x487
1119H
Triple
fft
,
math
3200
x509
1608F
MEX counting
combinatorics
,
dp
,
implementation
3200
x515
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x528
578F
Mirror Box
matrices
,
trees
3200
x529
611H
New Year and Forgotten Tree
constructive algorithms
,
flows
,
graphs
3200
x576
1034E
Little C Loves 3 III
bitmasks
,
dp
,
math
3200
x585
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x585
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x600
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x601
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x602
1025G
Company Acquisitions
constructive algorithms
,
math
3200
x608
1621G
Weighted Increasing Subsequences
data structures
,
dp
,
math
3200
x622
1810G
The Maximum Prefix
dp
3200
x629
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x635
590E
Birthday
graph matchings
,
strings
3200
x742
1017G
The Tree
data structures
3200
x789
1349D
Slime and Biscuits
math
,
probabilities
3200
x805
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x853
643G
Choosing Ads
data structures
3200
x911
1037H
Security
data structures
,
string suffix structures
3200
x956
573E
Bear and Bowling
data structures
,
greedy
3200
x1324
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2114
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1488I
Demonic Invasion
*special problem
,
flows
3100
x33
1423D
Does anyone else hate the wind?
3100
x35
1425C
Captain of Knights
math
3100
x37
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x41
958A3
Death Stars (hard)
3100
x44
720E
Cipher
implementation
3100
x62
856E
Satellites
3100
x65
164E
Polycarpus and Tasks
3100
x66
730F
Ber Patio
3100
x87
925F
Parametric Circulation
binary search
,
flows
3100
x94
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x97
720C
Homework
constructive algorithms
3100
x97
1089D
Distance Sum
graphs
3100
x98
1184D2
Parallel Universes (Hard)
math
,
matrices
3100
x102
1912F
Fugitive Frenzy
math
,
probabilities
3100
x104
269E
String Theory
geometry
,
math
,
strings
3100
x107
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x112
1044E
Grid Sort
implementation
3100
x112
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x116
446E
DZY Loves Bridges
math
,
matrices
3100
x118
388E
Fox and Meteor Shower
geometry
3100
x119
542B
Duck Hunt
data structures
3100
x125
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
477E
Dreamoon and Notepad
data structures
3100
x131
1599B
Restaurant Game
3100
x132
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x132
1666G
Global Warming
geometry
,
math
3100
x133
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x136
379G
New Year Cactus
dp
3100
x139
720F
Array Covering
data structures
3100
x143
1167G
Low Budget Inception
brute force
,
geometry
3100
x146
1510A
ASCII Automata Art
3100
x149
1250K
Projectors
flows
,
graphs
3100
x150
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