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Problems
#
Name
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14281
1675F
Vlad and Unfinished Business
dfs and similar
,
dp
,
greedy
,
trees
1800
x5036
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x11815
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x17034
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18812
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9737
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13247
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13398
1637D
Yet Another Minimization Problem
dp
,
greedy
,
math
1800
x7380
1635D
Infinite Set
bitmasks
,
dp
,
math
,
matrices
,
number theory
,
strings
1800
x6018
1633D
Make Them Equal
dp
,
greedy
1600
x13081
1632C
Strange Test
binary search
,
bitmasks
,
brute force
,
dp
,
math
1600
x12275
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10629
1625C
Road Optimization
dp
1700
x10089
1620C
BA-String
brute force
,
dp
,
greedy
,
implementation
,
math
1800
x6369
1619E
MEX and Increments
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
sortings
1700
x8719
1618D
Array and Operations
dp
,
greedy
,
math
1300
x18330
1614C
Divan and bitwise operations
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
math
1500
x9933
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9509
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6423
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x20103
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7115
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7634
1583C
Omkar and Determination
data structures
,
dp
1700
x6816
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5273
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3565
1575D
Divisible by Twenty-Five
brute force
,
dfs and similar
,
dp
1800
x2419
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8559
1571E
Fix the String
*special problem
,
bitmasks
,
dp
,
greedy
1700
x325
1567C
Carrying Conundrum
bitmasks
,
combinatorics
,
dp
,
math
1600
x11860
1562D1
Two Hundred Twenty One (easy version)
data structures
,
dp
,
math
1700
x6191
1561D1
Up the Strip (simplified version)
brute force
,
data structures
,
dp
,
math
,
number theory
1700
x5395
1557C
Moamen and XOR
bitmasks
,
combinatorics
,
dp
,
math
,
matrices
1700
x8343
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x11778
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x20933
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13360
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x17346
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13843
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6709
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13876
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x18409
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12301
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13590
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7499
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16118
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12519
1528B
Kavi on Pairing Duty
combinatorics
,
dp
,
math
1700
x8487
1528A
Parsa's Humongous Tree
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
trees
1600
x13938
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21282
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28847
1525D
Armchairs
dp
,
flows
,
graph matchings
,
greedy
1800
x9400
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14619
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7349
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11547
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18153
1513C
Add One
dp
,
matrices
1600
x13267
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x7826
1509C
The Sports Festival
dp
,
greedy
1800
x11847
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9207
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x8047
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15609
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x6906
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7727
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x16697
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8401
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11080
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x9757
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9336
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x7735
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x26129
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21317
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10507
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17330
1461C
Random Events
dp
,
math
,
probabilities
1500
x10866
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12366
1459B
Move and Turn
dp
,
math
1300
x13962
1455D
Sequence and Swaps
dp
,
greedy
,
sortings
1600
x12001
1452D
Radio Towers
combinatorics
,
dp
,
math
1600
x7775
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15224
1446B
Catching Cheaters
dp
,
strings
1800
x7562
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15511
1442A
Extreme Subtraction
constructive algorithms
,
dp
,
greedy
1800
x8578
1437C
Chef Monocarp
dp
,
flows
,
graph matchings
,
greedy
,
math
,
sortings
1800
x10134
1422C
Bargain
combinatorics
,
dp
,
math
1700
x8088
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x17041
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18304
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10667
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7578
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8644
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22076
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8870
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x11022
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x24279
1395C
Boboniu and Bit Operations
bitmasks
,
brute force
,
dp
,
greedy
1600
x13541
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6465
1392D
Omkar and Bed Wars
dp
,
greedy
1700
x8451
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14566
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18403
1389B
Array Walk
brute force
,
dp
,
greedy
1600
x15850
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18399
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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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