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Problems
#
Name
1886C
Decreasing String
implementation
,
strings
1600
x10178
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15121
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24491
1885A
Deterministic Scheduling for Extended Reality over 5G and Beyond
*special problem
1884E
Hard Design
greedy
,
implementation
,
math
2800
x262
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2799
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5426
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11652
1884A
Simple Design
brute force
,
greedy
,
math
800
x16425
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4857
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x9125
1883F
You Are So Beautiful
data structures
1400
x8187
1883E
Look Back
bitmasks
,
greedy
1700
x7016
1883D
In Love
data structures
,
greedy
1500
x9920
1883C
Raspberries
dp
,
math
1000
x22555
1883B
Chemistry
strings
900
x26682
1883A
Morning
math
800
x23828
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x281
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x955
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4963
1882C
Card Game
brute force
,
greedy
1500
x11284
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14242
1882A
Increasing Sequence
greedy
800
x24239
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2156
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5966
1881E
Block Sequence
dp
1500
x11627
1881D
Divide and Equalize
math
,
number theory
1300
x14312
1881C
Perfect Square
brute force
,
implementation
1200
x15801
1881B
Three Threadlets
math
900
x23581
1881A
Don't Try to Count
brute force
,
strings
800
x27302
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x471
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1181
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6563
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x14863
1879B
Chips on the Board
constructive algorithms
,
greedy
900
x21123
1879A
Rigged!
greedy
800
x22048
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1090
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3699
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10983
1878D
Reverse Madness
data structures
,
greedy
1600
x7557
1878C
Vasilije in Cacak
math
900
x28336
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x29798
1878A
How Much Does Daytona Cost?
greedy
800
x38652
1877C
Joyboard
math
,
number theory
1200
x10029
1877A
Goals of Victory
math
800
x18665
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x117
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x106
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x226
1876D
Lexichromatography
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2500
x811
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2133
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7483
1876A
Helmets in Night Light
greedy
,
sortings
1000
x14751
1875D
Jellyfish and Mex
dp
1600
x7558
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10761
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x21685
1874G
Jellyfish and Inscryption
dp
3500
x72
1874F
Jellyfish and OEIS
dp
3500
x152
1874E
Jellyfish and Hack
dp
,
math
3000
x266
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x647
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1502
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1061
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x15746
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6548
1873G
ABBC or BACB
constructive algorithms
,
greedy
1500
x11647
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13768
1873E
Building an Aquarium
binary search
,
sortings
1100
x22883
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32552
1873C
Target Practice
implementation
,
math
800
x35127
1873B
Good Kid
brute force
,
greedy
,
math
800
x44117
1873A
Short Sort
brute force
,
implementation
800
x48591
1872G
Replace With Product
brute force
,
greedy
,
math
2000
x3984
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x5791
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11886
1872D
Plus Minus Permutation
math
1200
x20874
1872C
Non-coprime Split
math
,
number theory
1100
x21919
1872B
The Corridor or There and Back Again
greedy
,
implementation
900
x26575
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37219
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x77
1870G
MEXanization
data structures
3300
x201
1870F
Lazy Numbers
binary search
,
math
2900
x463
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2202
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6411
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10705
1870B
Friendly Arrays
bitmasks
,
greedy
,
math
1200
x13315
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x18472
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x14352
1869A
Make It Zero
constructive algorithms
900
x18498
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x69
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x73
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x244
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1068
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2269
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6430
1868A
Fill in the Matrix
constructive algorithms
,
implementation
1300
x11141
1867F
Most Different Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
hashing
2700
x400
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x2974
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3505
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5324
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10527
1867B
XOR Palindromes
bitmasks
,
constructive algorithms
,
strings
1100
x15812
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