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number theory
combine-tags-by-or
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2-sat
binary search
bitmasks
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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
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interactive
math
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Custom test
Problems
#
Name
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x5287
1906G
Grid Game 2
games
,
number theory
2900
x60
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x8195
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x2788
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x9524
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x14308
1899A
Game with Integers
games
,
math
,
number theory
800
x27051
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x36
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x38
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2296
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x848
1881D
Divide and Equalize
math
,
number theory
1300
x11323
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x432
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3192
1877C
Joyboard
math
,
number theory
1200
x8358
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x6232
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x9301
1872C
Non-coprime Split
math
,
number theory
1100
x19911
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x6336
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x11452
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x26064
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x20428
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9734
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x20855
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x6867
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x14883
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x686
1848C
Vika and Price Tags
math
,
number theory
1800
x5442
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x311
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x22007
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x572
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x10780
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x12301
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x407
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x1826
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1381
1828B
Permutation Swap
math
,
number theory
900
x18281
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x11598
1826B
Lunatic Never Content
math
,
number theory
1100
x13833
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x10737
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2062
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x5747
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16343
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x294
1812F
Factorization
*special problem
,
number theory
x824
1812D
Trivial Conjecture
*special problem
,
constructive algorithms
,
math
,
number theory
x3946
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x10419
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x16610
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x289
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x10693
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x495
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x429
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7269
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1073
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x152
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3103
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1258
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x716
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x15362
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12140
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x1900
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x4975
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x599
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1265
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1211
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x15387
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x540
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x6984
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5190
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8072
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x533
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x7870
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1676
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27047
1766D
Lucky Chains
math
,
number theory
1600
x7497
1765M
Minimum LCM
math
,
number theory
1000
x10442
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x14329
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1585
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1874
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3069
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x15450
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18098
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3452
1759D
Make It Round
brute force
,
number theory
1400
x10861
1758C
Almost All Multiples
greedy
,
number theory
1400
x11804
1753B
Factorial Divisibility
math
,
number theory
1600
x11251
1750D
Count GCD
combinatorics
,
math
,
number theory
1800
x5139
1749D
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
1900
x4952
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2523
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x4813
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x9323
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x19341
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x93
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x18880
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x108
1736B
Playing with GCD
math
,
number theory
1200
x16022
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2641
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x383
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1290
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x7670
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