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Before contest
Codeforces Round 941 (Div. 1)
2 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
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data structures
combine-tags-by-or
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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
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Problems
#
Name
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x368
671E
Organizing a Race
data structures
,
greedy
3300
x394
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
1172F
Nauuo and Bug
data structures
3300
x397
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x469
1290E
Cartesian Tree
data structures
3300
x508
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x512
1270H
Number of Components
data structures
3300
x573
1063F
String Journey
data structures
,
dp
,
string suffix structures
3300
x796
576E
Painting Edges
binary search
,
data structures
3300
x1098
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
1599E
Two Arrays
data structures
,
matrices
3200
x66
730L
Expression Queries
data structures
3200
x81
1056H
Detect Robots
data structures
,
strings
3200
x144
482E
ELCA
data structures
,
trees
3200
x175
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x189
414E
Mashmokh's Designed Problem
data structures
3200
x191
1830F
The Third Grace
data structures
,
dp
3200
x219
1007D
Ants
2-sat
,
data structures
,
trees
3200
x256
1540D
Inverse Inversions
binary search
,
brute force
,
data structures
3200
x261
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x268
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x268
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
494E
Sharti
data structures
,
games
3200
x298
1712F
Triameter
binary search
,
data structures
,
dfs and similar
,
trees
3200
x302
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x302
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x306
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x326
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x363
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x364
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
x382
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x383
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
1523G
Try Booking
data structures
,
divide and conquer
3200
x401
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x487
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x585
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x601
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x602
1621G
Weighted Increasing Subsequences
data structures
,
dp
,
math
3200
x622
1017G
The Tree
data structures
3200
x789
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
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x112
542B
Duck Hunt
data structures
3100
x125
477E
Dreamoon and Notepad
data structures
3100
x131
720F
Array Covering
data structures
3100
x143
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x168
1499G
Graph Coloring
data structures
,
graphs
,
interactive
3100
x185
792F
Mages and Monsters
data structures
,
geometry
3100
x199
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x217
720D
Slalom
data structures
,
dp
,
sortings
3100
x222
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x239
1767F
Two Subtrees
data structures
,
trees
3100
x245
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x248
960H
Santa's Gift
data structures
,
trees
3100
x253
981H
K Paths
combinatorics
,
data structures
,
dp
,
fft
,
math
3100
x264
1344E
Train Tracks
data structures
,
trees
3100
x267
1332G
No Monotone Triples
data structures
3100
x282
418E
Tricky Password
data structures
3100
x290
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x325
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x326
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x366
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x371
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x394
855F
Nagini
binary search
,
data structures
3100
x394
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x398
1458E
Nim Shortcuts
data structures
,
games
3100
x404
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x447
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x517
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x525
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x555
633H
Fibonacci-ish II
data structures
,
implementation
3100
x563
453E
Little Pony and Lord Tirek
data structures
3100
x646
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x647
679E
Bear and Bad Powers of 42
data structures
3100
x658
407E
k-d-sequence
data structures
3100
x684
1628E
Groceries in Meteor Town
binary search
,
data structures
,
dsu
,
trees
3100
x822
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x967
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1018
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1289
765F
Souvenirs
data structures
3100
x1840
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x1960
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
1218B
Guarding warehouses
data structures
,
geometry
3000
x68
185E
Soap Time! - 2
binary search
,
data structures
3000
x103
1672I
PermutationForces
data structures
,
greedy
3000
x137
1758F
Decent Division
constructive algorithms
,
data structures
3000
x152
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x153
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x168
243E
Matrix
data structures
3000
x171
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x189
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