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brute force
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
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shortest paths
sortings
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strings
ternary search
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Problems
#
Name
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x734
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15037
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x87
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x78
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1452
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10083
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x2432
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11236
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x771
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3696
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x15701
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x517
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3004
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1571
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24498
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5432
1884A
Simple Design
brute force
,
greedy
,
math
800
x16428
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x956
1882C
Card Game
brute force
,
greedy
1500
x11290
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14247
1881C
Perfect Square
brute force
,
implementation
1200
x15817
1881A
Don't Try to Count
brute force
,
strings
800
x27327
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
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
x3704
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x117
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x21710
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1064
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x15757
1873B
Good Kid
brute force
,
greedy
,
math
800
x44176
1873A
Short Sort
brute force
,
implementation
800
x48650
1872G
Replace With Product
brute force
,
greedy
,
math
2000
x3986
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37229
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2204
1867F
Most Different Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
hashing
2700
x400
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5326
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x687
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x651
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6322
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2607
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5653
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x15988
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1662
1859C
Another Permutation Problem
brute force
,
dp
,
greedy
,
math
1200
x16285
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1246
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2690
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10623
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x11034
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23720
1854F
Mark and Spaceship
brute force
,
dp
3500
x111
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x380
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3330
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16495
1853A
Desorting
brute force
,
greedy
,
math
800
x27909
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x28604
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x17108
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32258
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9821
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x740
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2510
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x316
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12204
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6577
1846E1
Rudolf and Snowflakes (simple version)
brute force
,
implementation
,
math
1300
x15332
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26050
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7303
1844F1
Min Cost Permutation (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
math
2600
x737
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10947
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7297
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1701
1835C
Twin Clusters
bitmasks
,
brute force
,
constructive algorithms
,
math
,
probabilities
2600
x938
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x901
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7429
1834F
Typewriter
brute force
,
math
2500
x488
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4348
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x12669
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2054
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19602
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x603
1830B
The BOSS Can Count Pairs
brute force
,
math
2000
x4595
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24151
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1139
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1498
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8531
1826A
Trust Nobody
brute force
,
greedy
,
implementation
,
sortings
1200
x14493
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1195
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15303
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2299
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6478
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5556
1822A
TubeTube Feed
brute force
,
implementation
800
x23613
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2241
1821D
Black Cells
binary search
,
brute force
,
greedy
,
math
1900
x4752
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13586
1821B
Sort the Subarray
brute force
,
greedy
1100
x16902
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x597
1819A
Constructive Problem
brute force
,
greedy
1300
x12059
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x250
1817B
Fish Graph
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
1900
x3853
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