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Problems
#
Name
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3239
1801B
Buying gifts
data structures
,
greedy
,
sortings
1800
x5828
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21789
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x21404
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x22422
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2282
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11369
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15927
1797F
Li Hua and Path
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
trees
3000
x329
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1199
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3709
1796D
Maximum Subarray
data structures
,
dp
,
greedy
,
two pointers
2000
x3905
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1923
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11492
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1016
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1292
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x932
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18245
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5909
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x11565
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x18278
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2481
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x148
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x201
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x396
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1531
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x411
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2034
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1266
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1381
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1310
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7533
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11860
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x823
1776E
Crossing the Railways
data structures
,
dp
3500
x62
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x368
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x643
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1023
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x972
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2605
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3679
1767F
Two Subtrees
data structures
,
trees
3100
x248
1767C
Count Binary Strings
data structures
,
dp
2100
x2524
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19596
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1134
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x563
1764H
Doremy's Paint 2
data structures
3400
x166
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x419
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13946
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x562
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19336
1760C
Advantage
data structures
,
implementation
,
sortings
800
x35183
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4242
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3719
1758F
Decent Division
constructive algorithms
,
data structures
3000
x155
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x73
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1364
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x472
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13421
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1738
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10502
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x4497
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x88
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1538
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x245
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1417
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2234
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x104
1740H
MEX Tree Manipulation
data structures
,
trees
3300
x201
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4118
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x7720
1739F
Keyboard Design
bitmasks
,
data structures
,
dp
,
string suffix structures
,
strings
2600
x514
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4893
1738H
Palindrome Addicts
data structures
,
strings
3300
x228
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3331
1737G
Ela Takes Dancing Class
binary search
,
data structures
3500
x108
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1243
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14554
1735F
Pebbles and Beads
data structures
,
geometry
2900
x218
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1023
1735D
Meta-set
brute force
,
combinatorics
,
data structures
,
hashing
,
math
1700
x5305
1734D
Slime Escape
data structures
,
dp
,
greedy
,
two pointers
1800
x6047
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x414
1732D2
Balance (Hard version)
brute force
,
data structures
,
number theory
2400
x1367
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8298
1731D
Valiant's New Map
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x6764
1730F
Almost Sorted
bitmasks
,
data structures
,
dp
2700
x412
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x615
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x16082
1730A
Planets
data structures
,
greedy
,
sortings
800
x22543
1728E
Red-Black Pepper
brute force
,
data structures
,
greedy
,
math
,
number theory
2300
x1655
1728C
Digital Logarithm
data structures
,
greedy
,
sortings
1400
x15295
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x283
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12089
1725L
Lemper Cooking Competition
data structures
2400
x876
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x580
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x939
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x433
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10115
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