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Before contest
Good Bye 2024: 2025 is NEAR
4 days
→ Filter Problems
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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
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Status
Standings
Custom test
Problems
#
Name
888A
Local Extrema
brute force
,
implementation
800
x11118
887F
Row of Models
greedy
,
sortings
2500
x168
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x164
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x483
887C
Solution for Cube
brute force
,
implementation
1500
x2904
887B
Cubes for Masha
brute force
,
implementation
1300
x5662
887A
Div. 64
implementation
1000
x11354
886F
Symmetric Projections
geometry
2900
x269
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x1036
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1808
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5490
886B
Vlad and Cafes
1000
x7946
886A
ACM ICPC
brute force
1000
x10381
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x1078
884E
Binary Matrix
dsu
2500
x700
884D
Boxes And Balls
data structures
,
greedy
2300
x2055
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4770
884B
Japanese Crosswords Strike Back
implementation
1100
x6908
884A
Book Reading
implementation
800
x10546
883M
Quadcopter Competition
greedy
,
math
1100
x3619
883L
Berland.Taxi
data structures
2500
x239
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1106
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x582
883I
Photo Processing
binary search
,
dp
1900
x2051
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1651
883G
Orientation of Edges
dfs and similar
,
graphs
1900
x1425
883F
Lost in Transliteration
implementation
1300
x2291
883E
Field of Wonders
implementation
,
strings
1500
x1917
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x444
883C
Downloading B++
binary search
,
implementation
2300
x629
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x382
883A
Automatic Door
implementation
2200
x594
879B
Table Tennis
data structures
,
implementation
1200
x12712
879A
Borya's Diagnosis
implementation
900
x9112
878E
Numbers on the blackboard
combinatorics
,
dp
3300
x582
878D
Magic Breeding
bitmasks
2900
x711
878C
Tournament
data structures
,
graphs
2700
x933
878B
Teams Formation
data structures
,
implementation
2300
x1074
878A
Short Program
bitmasks
,
constructive algorithms
1600
x5568
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1856
877E
Danil and a Part-time Job
bitmasks
,
data structures
,
trees
2000
x4674
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x4442
877C
Slava and tanks
constructive algorithms
1600
x5758
877B
Nikita and string
brute force
,
dp
1500
x10613
877A
Alex and broken contest
implementation
,
strings
1100
x10939
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9289
876A
Trip For Meal
math
900
x9452
875F
Royal Questions
dsu
,
graphs
,
greedy
2500
x1384
875E
Delivery Club
binary search
,
data structures
,
dp
2600
x925
875D
High Cry
binary search
,
bitmasks
,
combinatorics
,
data structures
,
divide and conquer
2200
x2295
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x2138
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5228
875A
Classroom Watch
brute force
,
math
1200
x9713
873F
Forbidden Indices
dsu
,
string suffix structures
,
strings
2400
x1432
873E
Awards For Contestants
brute force
,
data structures
,
dp
2300
x706
873D
Merge Sort
constructive algorithms
,
divide and conquer
1800
x3235
873C
Strange Game On Matrix
greedy
,
two pointers
1600
x3330
873B
Balanced Substring
dp
,
implementation
1500
x7908
873A
Chores
implementation
800
x8381
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x150
870F
Paths
data structures
,
number theory
2700
x624
870E
Points, Lines and Ready-made Titles
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1239
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1235
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x9257
870B
Maximum of Maximums of Minimums
greedy
1200
x9673
870A
Search for Pretty Integers
brute force
,
implementation
900
x10235
869E
The Untended Antiquity
data structures
,
hashing
2400
x1844
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x252
869C
The Intriguing Obsession
combinatorics
,
dp
,
math
1800
x4744
869B
The Eternal Immortality
math
1100
x13864
869A
The Artful Expedient
brute force
,
implementation
1100
x9491
868G
El Toll Caves
math
3300
x136
868F
Yet Another Minimization Problem
divide and conquer
,
dp
2500
x3936
868E
Policeman and a Tree
dp
,
graphs
,
trees
2700
x530
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x927
868C
Qualification Rounds
bitmasks
,
brute force
,
constructive algorithms
,
dp
1500
x4650
868B
Race Against Time
implementation
1400
x3693
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8753
867A
Between the Offices
implementation
800
x19460
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x139
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x70
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x141
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x5871
865C
Gotta Go Fast
binary search
,
dp
2400
x855
865B
Ordering Pizza
binary search
,
sortings
,
ternary search
1900
x1872
865A
Save the problem!
constructive algorithms
1400
x4346
864F
Cities Excursions
dfs and similar
,
graphs
,
trees
2700
x637
864E
Fire
dp
,
sortings
2000
x4302
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x6028
864C
Bus
greedy
,
implementation
,
math
1500
x5874
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x9264
864A
Fair Game
implementation
,
sortings
1000
x11704
863G
Graphic Settings
3200
x57
863F
Almost Permutation
flows
2200
x1284
863E
Turn Off The TV
data structures
,
sortings
2000
x3221
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3325
863C
1-2-3
graphs
,
implementation
1800
x2525
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x8596
863A
Quasi-palindrome
brute force
,
implementation
900
x10296
862F
Mahmoud and Ehab and the final stage
data structures
,
strings
2900
x212
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