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Codeforces Round 1002 (Div. 2)
3 days
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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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Problems
#
Name
1874G
Jellyfish and Inscryption
dp
3500
x103
1874F
Jellyfish and OEIS
dp
3500
x256
1874E
Jellyfish and Hack
dp
,
math
3000
x339
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x759
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1790
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1189
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x17616
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x7864
1873G
ABBC or BACB
constructive algorithms
,
greedy
1500
x14191
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x16669
1873E
Building an Aquarium
binary search
,
sortings
1100
x29207
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x36680
1873C
Target Practice
implementation
,
math
800
x44446
1873B
Good Kid
brute force
,
greedy
,
math
800
x51766
1873A
Short Sort
brute force
,
implementation
800
x57936
1872G
Replace With Product
brute force
,
greedy
,
math
2000
x4434
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x6599
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x14740
1872D
Plus Minus Permutation
math
1200
x26062
1872C
Non-coprime Split
math
,
number theory
1100
x24150
1872B
The Corridor or There and Back Again
greedy
,
implementation
900
x28489
1872A
Two Vessels
brute force
,
greedy
,
math
800
x39967
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x88
1870G
MEXanization
data structures
3300
x227
1870F
Lazy Numbers
binary search
,
math
2900
x504
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2480
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x7249
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x11912
1870B
Friendly Arrays
bitmasks
,
greedy
,
math
1200
x14595
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19384
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x17333
1869A
Make It Zero
constructive algorithms
900
x23821
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x79
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x90
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x294
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1209
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2476
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x7253
1868A
Fill in the Matrix
constructive algorithms
,
implementation
1300
x12360
1867F
Most Different Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
hashing
2700
x431
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x3302
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3883
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x6045
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x11579
1867B
XOR Palindromes
bitmasks
,
constructive algorithms
,
strings
1100
x17165
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20287
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x839
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x739
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x460
1866J
Jackets and Packets
dp
2800
x298
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x790
1866H
Happy Sets
combinatorics
2100
x1695
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1791
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x139
1866E
Elevators of Tamem
dp
2700
x437
1866D
Digital Wallet
dp
,
greedy
2300
x1381
1866C
Completely Searching for Inversions
dfs and similar
,
dp
,
graphs
1900
x3118
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x8023
1866A
Ambitious Kid
math
800
x25387
1864I
Future Dominators
graphs
,
greedy
3500
x93
1864H
Asterism Stream
dp
,
math
,
matrices
3200
x303
1864G
Magic Square
combinatorics
,
constructive algorithms
,
implementation
3100
x285
1864F
Exotic Queries
data structures
,
implementation
,
sortings
2300
x1478
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2733
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x7009
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x13947
1864B
Swap and Reverse
constructive algorithms
,
greedy
,
sortings
,
strings
1100
x15690
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20577
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x86
1863H
Goldberg Machine 3
dp
,
trees
3500
x92
1863G
Swaps
combinatorics
,
dp
,
graphs
,
math
2800
x664
1863F
Divide, XOR, and Conquer
bitmasks
,
dp
,
math
2600
x1185
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2876
1863D
Two-Colored Dominoes
constructive algorithms
,
greedy
1400
x9819
1863C
MEX Repetition
implementation
,
math
1100
x14435
1863B
Split Sort
greedy
,
math
,
sortings
1100
x15605
1863A
Channel
greedy
,
implementation
800
x18099
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2985
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x6571
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x11231
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x17863
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x21346
1862B
Sequence Game
constructive algorithms
800
x34766
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x33243
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x215
1861E
Non-Intersecting Subpermutations
combinatorics
,
dp
,
implementation
,
math
2300
x1787
1861D
Sorting By Multiplication
dp
,
greedy
1800
x7046
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x10534
1861B
Two Binary Strings
constructive algorithms
,
dp
,
greedy
1000
x22020
1861A
Prime Deletion
constructive algorithms
,
math
800
x24297
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x286
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1514
1860D
Balanced String
dp
2200
x3111
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13884
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x17457
1860A
Not a Substring
constructive algorithms
,
strings
900
x22211
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x419
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1854
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x7255
1859C
Another Permutation Problem
brute force
,
dp
,
greedy
,
math
1200
x17408
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