Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
26:38:10
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
26:38:09
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
dfs and similar
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50072
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47736
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46325
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39598
115A
Party
dfs and similar
,
graphs
,
trees
900
x32727
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x28123
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26831
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x25060
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24047
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23726
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x22704
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x21691
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21560
377A
Maze
dfs and similar
1600
x21288
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20327
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20142
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x19253
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x19141
1490D
Permutation Transformation
dfs and similar
,
divide and conquer
,
implementation
1200
x18761
1311B
WeirdSort
dfs and similar
,
sortings
1200
x18465
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18089
277A
Learning Languages
dfs and similar
,
dsu
1400
x18066
977D
Divide by three, multiply by two
dfs and similar
,
math
,
sortings
1400
x17544
1669G
Fall Down
dfs and similar
,
implementation
1200
x17254
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17033
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x16956
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16931
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x16870
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x16306
1249B2
Books Exchange (hard version)
dfs and similar
,
dsu
,
math
1300
x16222
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x16169
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16089
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16050
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x15891
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15847
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15691
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15570
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15032
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14588
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14400
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14082
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14030
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14011
1623B
Game on Ranges
brute force
,
dfs and similar
,
implementation
,
sortings
1100
x13889
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13881
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13803
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13758
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13728
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13663
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x13511
510B
Fox And Two Dots
dfs and similar
1500
x13373
948A
Protect Sheep
brute force
,
dfs and similar
,
graphs
,
implementation
900
x13346
1263D
Secret Passwords
dfs and similar
,
dsu
,
graphs
1500
x13213
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13176
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13048
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x12909
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x12906
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12859
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12595
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12351
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12264
445B
DZY Loves Chemistry
dfs and similar
,
dsu
,
greedy
1400
x12067
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12064
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11983
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x11957
1303C
Perfect Keyboard
dfs and similar
,
greedy
,
implementation
1600
x11809
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11658
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11619
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11396
910A
The Way to Home
dfs and similar
,
dp
,
greedy
,
implementation
800
x11354
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11175
1143C
Queen
dfs and similar
,
trees
1400
x11157
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x10837
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x10822
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10760
1144F
Graph Without Long Directed Paths
dfs and similar
,
graphs
1700
x10746
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10449
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10448
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10404
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10342
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10314
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10196
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10080
429A
Xor-tree
dfs and similar
,
trees
1300
x9970
1406C
Link Cut Centroids
constructive algorithms
,
dfs and similar
,
graphs
,
trees
1700
x9792
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9540
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9479
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9407
1006E
Military Problem
dfs and similar
,
graphs
,
trees
1600
x9396
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x9372
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9361
1388C
Uncle Bogdan and Country Happiness
dfs and similar
,
greedy
,
math
,
trees
1800
x9331
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x9280
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9249
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9180
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9139
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x8990
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8982
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8845
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8838
←
1
2
3
...
8
9
→
User lists
Name