Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rating changes for last rounds are temporarily rolled back. They will be returned soon.
×
→ Pay attention
Before contest
Codeforces Round 941 (Div. 1)
3 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
3 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
graphs
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
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1434
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1436
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1454
1242C
Sum Balance
bitmasks
,
dfs and similar
,
dp
,
graphs
2400
x1464
1482F
Useful Edges
graphs
,
shortest paths
2400
x1465
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1492
1027F
Session in BSU
binary search
,
dfs and similar
,
dsu
,
graph matchings
,
graphs
2400
x1504
1290C
Prefix Enlightenment
dfs and similar
,
dsu
,
graphs
2400
x1529
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1549
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1577
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1593
1634E
Fair Share
constructive algorithms
,
data structures
,
dfs and similar
,
graph matchings
,
graphs
2400
x1593
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1594
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1631
1139E
Maximize Mex
flows
,
graph matchings
,
graphs
2400
x1637
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1650
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1658
1844E
Great Grids
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2400
x1680
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1684
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1717
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1761
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x1862
1408E
Avoid Rainbow Cycles
data structures
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1873
1082G
Petya and Graph
flows
,
graphs
2400
x1918
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2017
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2021
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2297
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2652
1473E
Minimum Path
graphs
,
shortest paths
2400
x3290
648E
Собери число
graphs
,
shortest paths
2300
x83
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x118
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x305
62D
Wormhouse
dfs and similar
,
graphs
2300
x346
1403B
Spring cleaning
*special problem
,
data structures
,
dfs and similar
,
graphs
,
trees
2300
x358
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x386
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x497
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x510
78E
Evacuation
flows
,
graphs
,
shortest paths
2300
x525
852I
Dating
brute force
,
dfs and similar
,
graphs
,
trees
2300
x554
1252L
Road Construction
flows
,
graphs
2300
x566
1090E
Horseback Riding
flows
,
graphs
2300
x573
1045C
Hyperspace Highways
dfs and similar
,
graphs
,
trees
2300
x619
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x633
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x794
1250E
The Coronation
graphs
,
implementation
2300
x796
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x804
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x844
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x850
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x855
141D
Take-off Ramps
graphs
,
shortest paths
2300
x863
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x902
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x907
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x971
870E
Points, Lines and Ready-made Titles
dfs and similar
,
dsu
,
graphs
,
trees
2300
x974
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x986
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2300
x1041
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1048
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1130
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1180
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1206
1310D
Tourism
dp
,
graphs
,
probabilities
2300
x1279
1385G
Columns Swaps
2-sat
,
dfs and similar
,
dsu
,
graphs
,
implementation
2300
x1299
405E
Graph Cutting
dfs and similar
,
graphs
2300
x1325
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1437
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1446
858F
Wizard's Tour
constructive algorithms
,
dfs and similar
,
graphs
2300
x1468
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1470
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1474
845G
Shortest Path Problem?
dfs and similar
,
graphs
,
math
2300
x1489
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1491
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1504
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1520
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1530
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1552
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1659
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1738
1394B
Boboniu Walks on Graph
brute force
,
dfs and similar
,
graphs
,
hashing
2300
x1782
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1844
1607F
Robot on the Board 2
brute force
,
dfs and similar
,
graphs
,
implementation
2300
x1881
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1946
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1986
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2001
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2062
891C
Envy
data structures
,
dsu
,
graphs
2300
x2209
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2229
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2238
1536E
Omkar and Forest
combinatorics
,
graphs
,
math
,
shortest paths
2300
x2335
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2347
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2425
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2482
1495C
Garden of the Sun
constructive algorithms
,
graphs
2300
x2498
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2584
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2655
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2665
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2970
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2983
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5384
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x75
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x278
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x359
←
1
2
3
4
5
6
7
...
9
10
→
User lists
Name