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Codeforces Round 950 (Div. 3)
14:28:07
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Difficulty:
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dp
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
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
1874G
Jellyfish and Inscryption
dp
3500
x75
1874F
Jellyfish and OEIS
dp
3500
x160
1874E
Jellyfish and Hack
dp
,
math
3000
x275
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x658
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1522
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1075
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2226
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x74
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1093
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2293
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x698
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x415
1866J
Jackets and Packets
dp
2800
x271
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x681
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1535
1866E
Elevators of Tamem
dp
2700
x279
1866D
Digital Wallet
dp
,
greedy
2300
x1209
1866C
Completely Searching for Inversions
dfs and similar
,
dp
,
graphs
1900
x2887
1864H
Asterism Stream
dp
,
math
,
matrices
3200
x273
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x71
1863H
Goldberg Machine 3
dp
,
trees
3500
x73
1863G
Swaps
combinatorics
,
dp
,
graphs
,
math
2800
x578
1863F
Divide, XOR, and Conquer
bitmasks
,
dp
,
math
2600
x1044
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2640
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5769
1861E
Non-Intersecting Subpermutations
combinatorics
,
dp
,
implementation
,
math
2300
x1633
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6350
1860D
Balanced String
dp
2200
x2818
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1679
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6609
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2720
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1321
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4963
1854F
Mark and Spaceship
brute force
,
dp
3500
x115
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x386
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1412
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3374
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x100
1852D
Miriany and Matchstick
constructive algorithms
,
dp
,
greedy
2800
x432
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1471
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1533
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1466
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4108
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x356
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1280
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7396
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x133
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1488
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5030
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x109
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x569
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x943
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1551
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7375
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1721
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1167
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2195
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1382
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x204
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4993
1832F
Zombies
binary search
,
dp
3200
x254
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2071
1830F
The Third Grace
data structures
,
dp
3200
x228
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x608
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1156
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1785
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3695
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1518
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1268
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x797
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1202
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x714
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2271
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x128
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x601
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1406
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x330
1815D
XOR Counting
bitmasks
,
combinatorics
,
dp
,
math
2600
x1060
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1267
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1642
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1935
1810G
The Maximum Prefix
dp
3200
x644
1809G
Prediction
combinatorics
,
dp
,
math
2800
x422
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x797
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x424
1808E2
Minibuses on Venus (medium version)
combinatorics
,
divide and conquer
,
dp
,
matrices
2500
x655
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1262
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3608
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x855
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1537
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6109
1804H
Code Lock
bitmasks
,
dp
3300
x170
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1375
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4445
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x550
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2073
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3251
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x273
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x709
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x778
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