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number theory
combine-tags-by-or
*combine tags by OR
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dfs and similar
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Problems
#
Name
1968C
Assembly via Remainders
constructive algorithms
,
number theory
x16628
1968A
Maximize?
brute force
,
math
,
number theory
x23751
1967B2
Reverse Card (Hard Version)
brute force
,
math
,
number theory
x2651
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
x8553
1965B
Missing Subsequence Sum
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1800
x4604
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x958
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3357
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1729
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x15332
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x11759
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x20023
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2068
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x483
1945B
Fireworks
math
,
number theory
900
x19510
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x182
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17693
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20410
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29815
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x873
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6750
1932B
Chaya Calendar
number theory
1100
x18314
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2433
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15768
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1537
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7447
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9953
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18175
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11780
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1653
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x132
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x23568
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24502
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1245
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3967
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13830
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8776
1906G
Grid Game 2
games
,
number theory
2900
x145
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12213
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3688
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12181
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x18051
1899A
Game with Integers
games
,
math
,
number theory
800
x37734
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
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2803
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x957
1881D
Divide and Equalize
math
,
number theory
1300
x14345
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x471
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3704
1877C
Joyboard
math
,
number theory
1200
x10040
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7493
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10768
1872C
Non-coprime Split
math
,
number theory
1100
x21968
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7185
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12572
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29257
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x21929
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10629
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23733
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7552
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x17130
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x740
1848C
Vika and Price Tags
math
,
number theory
1800
x5951
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x354
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24557
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x641
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11613
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13421
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x445
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2058
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1526
1828B
Permutation Swap
math
,
number theory
900
x20615
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12776
1826B
Lunatic Never Content
math
,
number theory
1100
x15703
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11659
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2301
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6486
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16928
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x325
1812F
Factorization
*special problem
,
number theory
x955
1812D
Trivial Conjecture
*special problem
,
constructive algorithms
,
math
,
number theory
x4336
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11540
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17134
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x328
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11512
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x544
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x467
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7772
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1188
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x168
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3341
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1303
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x760
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16958
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12689
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2024
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5235
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x668
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1370
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1304
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