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#
Name
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
x549
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x4553
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x135
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x20892
1968A
Maximize?
brute force
,
math
,
number theory
800
x28928
1967B2
Reverse Card (Hard Version)
brute force
,
math
,
number theory
2200
x3298
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
1400
x10777
1965B
Missing Subsequence Sum
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1800
x5462
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x1052
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3701
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1879
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x16632
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x12445
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x20884
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2164
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x510
1945B
Fireworks
math
,
number theory
900
x20233
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x187
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x18184
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20876
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x30354
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x903
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x7043
1932B
Chaya Calendar
number theory
1100
x18793
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2491
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x16270
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1578
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7672
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10369
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18508
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x12037
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1678
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x134
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x23936
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24712
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1266
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x4050
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x14349
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8998
1906G
Grid Game 2
games
,
number theory
2900
x148
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12493
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3769
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12433
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x18449
1899A
Game with Integers
games
,
math
,
number theory
800
x38967
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x94
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x83
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2888
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x967
1881D
Divide and Equalize
math
,
number theory
1300
x14891
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x475
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3833
1877C
Joyboard
math
,
number theory
1200
x10234
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7618
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10924
1872C
Non-coprime Split
math
,
number theory
1100
x22273
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7283
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12743
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x29767
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x22106
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10741
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x24230
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7633
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x17504
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x751
1848C
Vika and Price Tags
math
,
number theory
1800
x6014
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x356
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24931
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x654
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11723
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13599
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x454
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2087
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1542
1828B
Permutation Swap
math
,
number theory
900
x20991
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12907
1826B
Lunatic Never Content
math
,
number theory
1100
x16030
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11759
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2331
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6579
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16979
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x330
1812F
Factorization
*special problem
,
number theory
x963
1812D
Trivial Conjecture
*special problem
,
constructive algorithms
,
math
,
number theory
x4345
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11673
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x17205
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x333
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11604
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x550
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x471
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7855
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1203
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x170
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3385
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1316
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x773
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x17291
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12810
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2040
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5300
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