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Codeforces and Polygon may be unavailable from
May 23, 4:00 (UTC)
to
May 23, 8:00 (UTC)
due to technical maintenance.
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Codeforces Round (Div. 1 + Div. 2)
2 days
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→ Filter Problems
Difficulty:
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greedy
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
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
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Status
Standings
Custom test
Problems
#
Name
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x816
1070F
Debate
greedy
1500
x3570
1070D
Garbage Disposal
greedy
1300
x4852
1070C
Cloud Computing
data structures
,
greedy
2000
x1996
1070B
Berkomnadzor
data structures
,
greedy
2400
x469
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x355
1066B
Heaters
greedy
,
two pointers
1500
x8099
1065C
Make It Equal
greedy
1600
x7664
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1710
1062C
Banh-mi
greedy
,
implementation
,
math
1600
x5317
1062B
Math
greedy
,
math
,
number theory
1500
x8441
1062A
A Prank
greedy
,
implementation
1300
x8680
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2297
1061B
Views Matter
greedy
,
implementation
,
sortings
1400
x7232
1061A
Coins
greedy
,
implementation
,
math
800
x21353
1060D
Social Circles
greedy
,
math
1900
x3568
1060B
Maximum Sum of Digits
greedy
1100
x8789
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1354
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5689
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2321
1055D
Refactoring
greedy
,
implementation
,
strings
2400
x616
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x262
1054D
Changing Array
greedy
,
implementation
1900
x2215
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x376
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9150
1051B
Relatively Prime Pairs
greedy
,
math
,
number theory
1000
x16625
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8321
1046C
Space Formula
greedy
1400
x3038
1043E
Train Hard, Win Easy
constructive algorithms
,
greedy
,
math
,
sortings
1900
x2689
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6788
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1239
1042C
Array Product
constructive algorithms
,
greedy
,
math
1700
x4630
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3518
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9290
1041A
Heist
greedy
,
implementation
,
sortings
800
x24574
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7015
1040A
Palindrome Dance
greedy
1000
x9345
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x771
1038D
Slime
dp
,
greedy
,
implementation
1800
x8132
1038C
Gambling
greedy
,
sortings
1300
x9341
1037C
Equalize
dp
,
greedy
,
strings
1300
x18350
1037B
Reach Median
greedy
1300
x10207
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x10947
1036D
Vasya and Arrays
greedy
,
two pointers
1600
x8991
1031D
Minimum path
greedy
1900
x2618
1031C
Cram Time
greedy
1600
x5166
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x2790
1029C
Maximal Intersection
greedy
,
math
,
sortings
1600
x7324
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x16429
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1713
1027C
Minimum Value Rectangle
greedy
1600
x6604
1025B
Weakened Common Divisor
brute force
,
greedy
,
number theory
1600
x7763
1023C
Bracket Subsequence
greedy
1200
x9615
1019A
Elections
brute force
,
greedy
1700
x4569
1017C
The Phone Number
constructive algorithms
,
greedy
1600
x5915
1016A
Death Note
greedy
,
implementation
,
math
900
x14685
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3476
1015E1
Stars Drawing (Easy Edition)
brute force
,
dp
,
greedy
1700
x5480
1015D
Walking Between Houses
constructive algorithms
,
greedy
1600
x7948
1013B
And
greedy
1200
x7488
1011A
Stages
greedy
,
implementation
,
sortings
900
x11950
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x771
1009D
Relatively Prime Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
math
1700
x6161
1009C
Annoying Present
greedy
,
math
1700
x5198
1009B
Minimum Ternary String
greedy
,
implementation
1400
x9910
1008B
Turn the Rectangles
greedy
,
sortings
1000
x11253
1006B
Polycarp's Practice
greedy
,
implementation
,
sortings
1200
x12853
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x9852
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11342
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1012
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9219
1003D
Coins and Queries
greedy
1600
x7541
1000B
Light It Up
greedy
1500
x5594
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8593
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6380
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4166
998B
Cutting
dp
,
greedy
,
sortings
1200
x12780
997B
Roman Digits
brute force
,
combinatorics
,
dp
,
greedy
,
math
2000
x2864
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8168
996A
Hit the Lottery
dp
,
greedy
800
x84831
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1730
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7017
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5546
993D
Compute Power
binary search
,
dp
,
greedy
2500
x593
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x294
991D
Bishwock
dp
,
greedy
1500
x7053
991B
Getting an A
greedy
,
sortings
900
x12341
990F
Flow Control
dfs and similar
,
dp
,
greedy
,
trees
2400
x871
990E
Post Lamps
brute force
,
greedy
2100
x1975
990B
Micro-World
greedy
,
sortings
1200
x7992
988E
Divisibility by 25
brute force
,
greedy
2100
x3681
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6541
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3264
985C
Liebig's Barrels
greedy
1500
x5580
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10871
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8182
981F
Round Marriage
binary search
,
graph matchings
,
greedy
2500
x674
981D
Bookshelves
bitmasks
,
dp
,
greedy
1900
x3177
980E
The Number Games
data structures
,
greedy
,
trees
2200
x1804
980C
Posterized
games
,
greedy
1700
x3725
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