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Before contest
Codeforces Round 954 (Div. 3)
6 days
→ Filter Problems
Difficulty:
—
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
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Status
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Custom test
Problems
#
Name
1984E
Shuffle
dp
,
greedy
,
trees
2400
x984
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
2400
x1113
1980F2
Field Division (hard version)
math
,
sortings
2400
x672
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x971
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1621
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x246
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x372
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x371
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1091
1958G
Observation Towers
*special problem
2400
x95
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x1080
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1309
1938K
Tree Quiz
2400
x541
1938F
Forming Groups
2400
x669
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1150
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1214
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1237
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x1030
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1068
1913E
Matrix Problem
flows
,
graphs
2400
x937
1912H
Hypercatapult Commute
graphs
2400
x382
1912G
Great City Saint Petersburg
data structures
2400
x428
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x83
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1277
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x880
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x917
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1609
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1362
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x970
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1195
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1086
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1098
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x700
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x663
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1330
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1478
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1477
1844E
Great Grids
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2400
x1698
1839E
Decreasing Game
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
interactive
2400
x1174
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2095
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1816
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1561
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1790
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1521
1819C
The Fox and the Complete Tree Traversal
constructive algorithms
,
dp
,
implementation
,
math
,
trees
2400
x1411
1817C
Similar Polynomials
combinatorics
,
math
2400
x937
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x801
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1377
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1073
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1027
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1325
1784D
Wooden Spoon
combinatorics
,
dp
2400
x966
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x678
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1326
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1708
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x836
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1026
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1310
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x564
1765A
Access Levels
bitmasks
,
dsu
,
flows
,
graph matchings
2400
x670
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1194
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1749
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1686
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1370
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1639
1743E
FTL
binary search
,
dp
2400
x1497
1739E
Cleaning Robot
bitmasks
,
dp
2400
x1185
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1182
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1250
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1027
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1375
1726E
Almost Perfect
combinatorics
,
fft
,
math
2400
x1365
1725L
Lemper Cooking Competition
data structures
2400
x883
1720D2
Xor-Subsequence (hard version)
bitmasks
,
data structures
,
dp
,
strings
,
trees
2400
x1769
1718C
Tonya and Burenka-179
data structures
,
greedy
,
math
,
number theory
2400
x1534
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1633
1713E
Cross Swapping
2-sat
,
data structures
,
dsu
,
greedy
,
matrices
2400
x1530
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x476
1709E
XOR Tree
bitmasks
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2400
x2491
1707C
DFS Trees
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1403
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1662
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1152
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1129
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x1110
1673F
Anti-Theft Road Planning
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
interactive
,
math
2400
x779
1670F
Jee, You See?
bitmasks
,
combinatorics
,
dp
2400
x925
1667C
Half Queen Cover
constructive algorithms
,
math
2400
x1532
1638E
Colorful Operations
brute force
,
data structures
,
implementation
2400
x1811
1634E
Fair Share
constructive algorithms
,
data structures
,
dfs and similar
,
graph matchings
,
graphs
2400
x1610
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1469
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1114
1630D
Flipping Range
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x1530
1628D2
Game on Sum (Hard Version)
combinatorics
,
dp
,
games
,
math
2400
x2002
1626E
Black and White Tree
dfs and similar
,
greedy
,
trees
2400
x1523
1620G
Subsequences Galore
bitmasks
,
combinatorics
,
dp
2400
x866
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1086
1617D2
Too Many Impostors (hard version)
constructive algorithms
,
implementation
,
interactive
,
math
2400
x1730
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1411
1609E
William The Oblivious
bitmasks
,
data structures
,
dp
,
matrices
2400
x1887
1608D
Dominoes
combinatorics
,
fft
,
graphs
,
math
,
number theory
2400
x1358
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