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When submitting a solution in C++, please select either C++14 (GCC 6-32) or C++17 (GCC 7-32) as your compiler.
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Codeforces Round 936 (Div. 2)
2 days
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number theory
combine-tags-by-or
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2-sat
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bitmasks
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combinatorics
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dfs and similar
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fft
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graph matchings
graphs
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Problems
#
Name
1945H
GCD is Greater
bitmasks
,
brute force
,
number theory
x59
1945B
Fireworks
math
,
number theory
x10332
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x137
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16181
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x18954
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x27952
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x743
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x5872
1932B
Chaya Calendar
number theory
1100
x16914
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2239
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x14643
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1388
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x6866
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x8723
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17457
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11161
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1571
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x124
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x22806
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24007
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1191
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3698
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x12860
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8269
1906G
Grid Game 2
games
,
number theory
2900
x134
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x11701
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3494
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x11722
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x17219
1899A
Game with Integers
games
,
math
,
number theory
800
x34767
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x77
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x71
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2688
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x929
1881D
Divide and Equalize
math
,
number theory
1300
x13347
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x458
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3583
1877C
Joyboard
math
,
number theory
1200
x9747
1876B
Effects of Anti Pimples
combinatorics
,
number theory
,
sortings
1500
x7197
1875C
Jellyfish and Green Apple
bitmasks
,
greedy
,
math
,
number theory
1400
x10441
1872C
Non-coprime Split
math
,
number theory
1100
x21511
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7017
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x12320
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x27971
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x21574
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10375
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x22680
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7337
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x16487
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x730
1848C
Vika and Price Tags
math
,
number theory
1800
x5778
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x334
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x23453
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x625
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11393
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13149
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x429
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x1977
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1480
1828B
Permutation Swap
math
,
number theory
900
x19753
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12492
1826B
Lunatic Never Content
math
,
number theory
1100
x15150
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11437
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2198
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6224
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16804
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x312
1812F
Factorization
*special problem
,
number theory
x881
1812D
Trivial Conjecture
*special problem
,
constructive algorithms
,
math
,
number theory
x4060
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11233
1810B
Candies
constructive algorithms
,
math
,
number theory
800
x16994
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x321
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11284
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x532
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x460
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7618
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1144
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x164
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3276
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1288
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x749
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16212
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12542
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x1988
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5166
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x653
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1343
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1283
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16126
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x586
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7484
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5589
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8752
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x571
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8171
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1753
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27685
1766D
Lucky Chains
math
,
number theory
1600
x8132
1765M
Minimum LCM
math
,
number theory
1000
x11773
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x14786
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