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Name
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4996
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x17083
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x108
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x563
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x929
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1544
1842C
Tenzing and Balls
dp
1500
x11744
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7331
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1709
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1162
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2183
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1376
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x203
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4962
1832F
Zombies
binary search
,
dp
3200
x253
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2061
1830F
The Third Grace
data structures
,
dp
3200
x221
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x606
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12505
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7124
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9460
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24338
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1148
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1775
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3670
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1507
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8637
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1255
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x790
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1199
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5602
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x708
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2252
1819F
Willy-nilly, Crack, Into Release!
data structures
,
dp
3500
x127
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x597
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1398
1815E
Bosco and Particle
dp
,
math
,
number theory
,
strings
3100
x328
1815D
XOR Counting
bitmasks
,
combinatorics
,
dp
,
math
2600
x1047
1814E
Chain Chips
data structures
,
dp
,
matrices
2300
x1254
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1626
1811G1
Vlad and the Nice Paths (easy version)
combinatorics
,
dp
,
math
2100
x1920
1811E
Living Sequence
binary search
,
dp
,
math
,
number theory
1500
x11606
1810G
The Maximum Prefix
dp
3200
x635
1809G
Prediction
combinatorics
,
dp
,
math
2800
x414
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x792
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x419
1808E2
Minibuses on Venus (medium version)
combinatorics
,
divide and conquer
,
dp
,
matrices
2500
x650
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1254
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3596
1807G2
Subsequence Addition (Hard Version)
bitmasks
,
dp
,
greedy
,
implementation
,
sortings
1100
x17772
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17898
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x851
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1529
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6069
1804H
Code Lock
bitmasks
,
dp
3300
x169
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1364
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4429
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x546
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2054
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3239
1799H
Tree Cutting
bitmasks
,
dfs and similar
,
dp
3200
x271
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x702
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x768
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2282
1799D1
Hot Start Up (easy version)
dp
1900
x4104
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x467
1798E
Multitest Generator
brute force
,
dp
2300
x1527
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3709
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x697
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x3905
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1923
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1016
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3360
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x932
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5781
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x374
1792F1
Graph Coloring (easy version)
combinatorics
,
dp
,
graphs
2700
x672
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1310
1791E
Negatives and Positives
dp
,
greedy
,
sortings
1100
x25756
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x521
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x766
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8109
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2481
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x201
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6736
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x303
1784D
Wooden Spoon
combinatorics
,
dp
2400
x955
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4195
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x737
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1381
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1222
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7531
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x599
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2567
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3231
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x353
1776K
Uniform Chemistry
dp
,
math
3200
x64
1776E
Crossing the Railways
data structures
,
dp
3500
x62
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1245
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x743
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27:28:33
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combine-tags-by-or
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2-sat
binary search
bitmasks
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data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
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games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
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number theory
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