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→ Filter Problems
Difficulty:
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implementation
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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Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x5789
2038M
Royal Flush
dp
,
implementation
2800
x170
2038J
Waiting for...
greedy
,
implementation
800
x4412
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x1536
2038D
Divide OR Conquer
bitmasks
,
data structures
,
dp
,
implementation
2400
x421
2037B
Intercepted Inputs
brute force
,
implementation
800
x17126
2037A
Twice
implementation
800
x22091
2036D
I Love 1543
brute force
,
implementation
,
matrices
1300
x11403
2036C
Anya and 1100
brute force
,
implementation
1100
x16198
2036A
Quintomania
implementation
800
x30189
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x1506
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x4400
2035A
Sliding
implementation
,
math
800
x14745
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x32728
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x942
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x4504
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x15421
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x20119
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x1582
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
two pointers
1700
x5224
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x675
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x1319
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x6214
2028F
Alice's Adventures in Addition
bitmasks
,
brute force
,
dp
,
implementation
2700
x294
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x2296
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x8393
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x13653
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1295
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x4666
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x18436
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
2700
x171
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x3947
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x8559
2025D
Attribute Checks
brute force
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1800
x5878
2025C
New Game
binary search
,
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x14434
2023C
C+K+S
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
,
strings
2400
x948
2022D1
Asesino (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
implementation
,
interactive
1900
x2805
2022C
Gerrymandering
dp
,
implementation
1800
x3856
2022A
Bus to Pénjamo
constructive algorithms
,
greedy
,
implementation
,
math
800
x13702
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1480
2021D
Boss, Thirsty
dp
,
greedy
,
implementation
2500
x675
2021C2
Adjust The Presentation (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1900
x3554
2020C
Bitwise Balancing
bitmasks
,
hashing
,
implementation
,
math
,
schedules
,
ternary search
1400
x14385
2019B
All Pairs Segments
implementation
,
math
1200
x13817
2018D
Max Plus Min Plus Size
data structures
,
dp
,
dsu
,
greedy
,
implementation
,
matrices
,
sortings
2200
x1592
2018B
Speedbreaker
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1900
x3939
2018A
Cards Partition
2-sat
,
brute force
,
greedy
,
implementation
,
math
1600
x10126
2014G
Milky Days
brute force
,
data structures
,
greedy
,
implementation
2200
x1278
2014A
Robin Helps
greedy
,
implementation
800
x36954
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x473
2010B
Three Brothers
brute force
,
implementation
,
math
800
x19830
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x16766
2009G3
Yunli's Subarray Queries (extreme version)
data structures
,
dp
,
implementation
2700
x331
2009C
The Legend of Freya the Frog
implementation
,
math
1100
x25842
2009B
osu!mania
brute force
,
implementation
800
x41762
2008E
Alternating String
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
strings
1500
x9982
2006F
Dora's Paint
brute force
,
combinatorics
,
constructive algorithms
,
graphs
,
implementation
3500
x118
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x675
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x797
2005E1
Subtangle Game (Easy Version)
dp
,
games
,
greedy
,
implementation
2100
x2694
2005D
Alter the GCD
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
number theory
2400
x875
2005C
Lazy Narek
dp
,
implementation
,
strings
1800
x7025
2004D
Colored Portals
binary search
,
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
1600
x10734
2004A
Closest Point
implementation
,
math
800
x30266
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
math
2100
x4003
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x19439
2001D
Longest Max Min Subsequence
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1900
x5034
2001A
Make All Equal
greedy
,
implementation
800
x29544
2000H
Ksyusha and the Loaded Set
binary search
,
brute force
,
data structures
,
implementation
2200
x1656
2000F
Color Rows and Columns
dp
,
greedy
,
implementation
,
math
1900
x5396
2000D
Right Left Wrong
greedy
,
implementation
,
two pointers
1200
x23020
2000A
Primary Task
implementation
,
math
,
strings
800
x37338
1999E
Triple Operations
dp
,
implementation
,
math
1300
x18671
1999D
Slavic's Exam
greedy
,
implementation
,
strings
1100
x27005
1999C
Showering
greedy
,
implementation
800
x35096
1999B
Card Game
brute force
,
constructive algorithms
,
implementation
1000
x32440
1999A
A+B Again?
implementation
,
math
800
x56192
1998E2
Eliminating Balls With Merging (Hard Version)
binary search
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
2500
x694
1998C
Perform Operations to Maximize Score
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x6131
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x23952
1997E
Level Up
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2200
x3136
1997A
Strong Password
brute force
,
implementation
,
strings
800
x29247
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x9829
1996B
Scale
greedy
,
implementation
800
x32606
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x8589
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x24246
1994A
Diverse Game
constructive algorithms
,
greedy
,
implementation
800
x20257
1993E
Xor-Grid Problem
bitmasks
,
constructive algorithms
,
dp
,
implementation
2700
x545
1993C
Light Switches
implementation
,
math
1400
x13647
1993A
Question Marks
greedy
,
implementation
800
x29431
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x9174
1992D
Test of Love
dp
,
greedy
,
implementation
1200
x20455
1991G
Grid Reset
constructive algorithms
,
greedy
,
implementation
2700
x612
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2328
1991A
Maximize the Last Element
greedy
,
implementation
800
x21875
1990D
Grid Puzzle
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
1800
x6326
1989A
Catch the Coin
implementation
800
x26411
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1426
1988B
Make Majority
greedy
,
implementation
900
x22823
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x23291
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