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Codeforces Round 937 (Div. 4)
00:33:03
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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
514E
Darth Vader and Tree
dp
,
matrices
2200
x1347
1650F
Vitaly and Advanced Useless Algorithms
dp
,
greedy
,
implementation
2200
x1345
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1333
850C
Arpa and a game with Mojtaba
bitmasks
,
dp
,
games
2200
x1328
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1313
965E
Short Code
data structures
,
dp
,
greedy
,
strings
,
trees
2200
x1311
1039C
Network Safety
dfs and similar
,
dsu
,
graphs
,
math
,
sortings
2200
x1308
461C
Appleman and a Sheet of Paper
data structures
,
implementation
2200
x1308
425B
Sereja and Table
bitmasks
,
greedy
2200
x1279
925C
Big Secret
constructive algorithms
,
math
2200
x1276
756C
Nikita and stack
data structures
2200
x1268
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1264
757D
Felicity's Big Secret Revealed
bitmasks
,
dp
2200
x1263
762E
Radio stations
binary search
,
data structures
2200
x1262
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1247
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1245
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1242
691F
Couple Cover
brute force
,
dp
,
number theory
2200
x1239
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1228
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1219
645E
Intellectual Inquiry
dp
,
greedy
,
strings
2200
x1213
1252E
Songwriter
greedy
,
two pointers
2200
x1205
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1186
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1182
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1174
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1170
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1168
863F
Almost Permutation
flows
2200
x1165
364B
Free Market
dp
,
greedy
2200
x1143
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1139
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1135
906B
Seating of Students
brute force
,
constructive algorithms
,
math
2200
x1115
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x1113
1089A
Alice the Fan
dp
2200
x1110
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1098
286B
Shifting
implementation
2200
x1098
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1095
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1082
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1081
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x1075
1003F
Abbreviation
dp
,
hashing
,
strings
2200
x1063
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1056
962E
Byteland, Berland and Disputed Cities
constructive algorithms
,
greedy
2200
x1040
946E
Largest Beautiful Number
greedy
,
implementation
2200
x1039
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1036
1136E
Nastya Hasn't Written a Legend
binary search
,
data structures
2200
x1035
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1035
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1003
847D
Dog Show
constructive algorithms
,
data structures
,
greedy
2200
x1002
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1001
45G
Prime Problem
number theory
2200
x984
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x959
954I
Yet Another String Matching Problem
fft
,
math
2200
x951
387D
George and Interesting Graph
graph matchings
2200
x948
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x934
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x900
1425E
Excitation of Atoms
greedy
,
implementation
2200
x899
518E
Arthur and Questions
greedy
,
implementation
,
math
,
ternary search
2200
x899
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x892
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x889
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x887
958E2
Guard Duty (medium)
binary search
,
dp
,
greedy
,
sortings
2200
x884
690C3
Brain Network (hard)
trees
2200
x876
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x869
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x864
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x861
575G
Run for beer
dfs and similar
,
shortest paths
2200
x861
387E
George and Cards
binary search
,
data structures
2200
x844
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x843
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x817
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x801
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x793
1938E
Duplicates
2200
x782
420D
Cup Trick
data structures
2200
x747
47D
Safe
brute force
2200
x739
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x738
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x737
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x730
509D
Restoring Numbers
constructive algorithms
,
math
2200
x728
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x720
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x716
1912E
Evaluate It and Back Again
constructive algorithms
,
implementation
,
math
2200
x715
730E
Award Ceremony
greedy
,
implementation
2200
x706
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x677
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x674
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x672
71E
Nuclear Fusion
bitmasks
,
dp
2200
x661
413E
Maze 2D
data structures
,
divide and conquer
2200
x660
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x641
1575G
GCD Festival
math
,
number theory
2200
x635
1045D
Interstellar battle
math
,
probabilities
,
trees
2200
x626
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x623
903F
Clear The Matrix
bitmasks
,
dp
2200
x618
1575K
Knitting Batik
implementation
,
math
2200
x615
440D
Berland Federalization
dp
,
trees
2200
x612
73D
FreeDiv
dfs and similar
,
graphs
,
greedy
2200
x609
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x606
219E
Parking Lot
data structures
2200
x594
1184C2
Heidi and the Turing Test (Medium)
data structures
2200
x591
183C
Cyclic Coloring
dfs and similar
2200
x588
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