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Codeforces Round 940 (Div. 2)
4 days
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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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Problems
#
Name
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x161
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x67
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x862
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2949
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1307
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2757
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5347
1883C
Raspberries
dp
,
math
1000
x22175
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4899
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5894
1881E
Block Sequence
dp
1500
x11395
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x6461
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x14692
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x212
1875D
Jellyfish and Mex
dp
1600
x7424
1874G
Jellyfish and Inscryption
dp
3500
x68
1874F
Jellyfish and OEIS
dp
3500
x150
1874E
Jellyfish and Hack
dp
,
math
3000
x259
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x637
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1487
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1045
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11712
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2184
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10650
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x71
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1058
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2253
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x680
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x402
1866J
Jackets and Packets
dp
2800
x263
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x665
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1490
1866E
Elevators of Tamem
dp
2700
x263
1866D
Digital Wallet
dp
,
greedy
2300
x1176
1866C
Completely Searching for Inversions
dfs and similar
,
dp
,
graphs
1900
x2820
1864H
Asterism Stream
dp
,
math
,
matrices
3200
x264
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6279
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x66
1863H
Goldberg Machine 3
dp
,
trees
3500
x69
1863G
Swaps
combinatorics
,
dp
,
graphs
,
math
2800
x525
1863F
Divide, XOR, and Conquer
bitmasks
,
dp
,
math
2600
x989
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2586
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5579
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30470
1861E
Non-Intersecting Subpermutations
combinatorics
,
dp
,
implementation
,
math
2300
x1591
1861D
Sorting By Multiplication
dp
,
greedy
1800
x6174
1861B
Two Binary Strings
constructive algorithms
,
dp
,
greedy
1000
x19920
1860D
Balanced String
dp
2200
x2751
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12299
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1649
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6470
1859C
Another Permutation Problem
brute force
,
dp
,
greedy
,
math
1200
x16195
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2661
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10521
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1295
1856E1
PermuTree (easy version)
dfs and similar
,
dp
,
trees
1800
x4850
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10896
1854F
Mark and Spaceship
brute force
,
dp
3500
x107
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x373
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1381
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3294
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x95
1852D
Miriany and Matchstick
constructive algorithms
,
dp
,
greedy
2800
x421
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1414
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9301
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1482
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1432
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12127
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x3995
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17803
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x347
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1251
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7241
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13215
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x126
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14724
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1453
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4927
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x16907
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x106
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x553
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x910
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1517
1842C
Tenzing and Balls
dp
1500
x11476
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7225
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1673
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1081
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2158
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1344
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x196
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4865
1832F
Zombies
binary search
,
dp
3200
x249
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2044
1830F
The Third Grace
data structures
,
dp
3200
x217
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x575
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12289
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x6946
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9259
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x23961
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1118
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