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combine-tags-by-or
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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
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1746
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4429
1753B
Factorial Divisibility
math
,
number theory
1600
x12698
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x10280
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14867
1750H
BinaryStringForces
constructive algorithms
,
data structures
,
dp
3500
x82
1750G
Doping
combinatorics
,
dp
,
math
3300
x246
1750F
Majority
combinatorics
,
dp
,
math
,
strings
2700
x904
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1406
1750D
Count GCD
combinatorics
,
math
,
number theory
1800
x5842
1750C
Complementary XOR
constructive algorithms
,
implementation
1400
x9519
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x16212
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17038
1749F
Distance to the Path
data structures
,
dfs and similar
,
trees
2800
x497
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1692
1749D
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
1900
x5553
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13888
1749B
Death's Blessing
greedy
900
x20959
1749A
Cowardly Rooks
greedy
,
implementation
800
x22308
1748F
Circular Xor Reversal
bitmasks
,
constructive algorithms
3000
x334
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1881
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2791
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x11056
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14979
1748A
The Ultimate Square
math
800
x24019
1747E
List Generation
combinatorics
,
dp
,
math
2900
x508
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x4632
1747C
Swap Game
games
1200
x21126
1747B
BAN BAN
constructive algorithms
900
x22880
1747A
Two Groups
constructive algorithms
,
greedy
800
x24810
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x96
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1715
1746E2
Joking (Hard Version)
dp
,
interactive
3200
x391
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1428
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4594
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12765
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x17120
1746A
Maxmina
constructive algorithms
,
greedy
800
x19791
1744F
MEX vs MED
math
,
two pointers
2000
x3065
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x5567
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x10804
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x21304
1744C
Traffic Light
binary search
,
implementation
,
two pointers
1000
x26985
1744B
Even-Odd Increments
implementation
,
math
800
x23437
1744A
Number Replacement
greedy
,
implementation
800
x27092
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x255
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1483
1743E
FTL
binary search
,
dp
2400
x1555
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7564
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x19119
1743B
Permutation Value
constructive algorithms
,
greedy
800
x22181
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26685
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x10672
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x11600
1742E
Scuza
binary search
,
greedy
,
math
1200
x24396
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x23481
1742C
Stripes
implementation
900
x32808
1742B
Increasing
greedy
,
implementation
,
sortings
800
x47421
1742A
Sum
implementation
800
x71250
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1491
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2378
1741E
Sending a Sequence Over the Network
dp
1600
x12134
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x15171
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17714
1741B
Funny Permutation
constructive algorithms
,
math
800
x25342
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x30748
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x113
1740H
MEX Tree Manipulation
data structures
,
trees
3300
x232
1740G
Dangerous Laser Power
constructive algorithms
,
dsu
,
sortings
3100
x185
1740F
Conditional Mix
combinatorics
,
dp
,
math
2600
x794
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4310
1740D
Knowledge Cards
constructive algorithms
,
data structures
1500
x8043
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10986
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13727
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x20109
1739F
Keyboard Design
bitmasks
,
data structures
,
dp
,
string suffix structures
,
strings
2600
x528
1739E
Cleaning Robot
bitmasks
,
dp
2400
x1216
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5138
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x9055
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x22272
1739A
Immobile Knight
implementation
800
x22609
1738H
Palindrome Addicts
data structures
,
strings
3300
x235
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x426
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1215
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1532
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3422
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x11125
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x15517
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13500
1737G
Ela Takes Dancing Class
binary search
,
data structures
3500
x116
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x123
1737E
Ela Goes Hiking
combinatorics
,
dp
,
math
,
probabilities
2500
x927
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1855
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5731
1737B
Ela's Fitness and the Luxury Number
binary search
,
implementation
,
math
1300
x9377
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x10116
1736E
Swap and Take
dp
,
greedy
2600
x706
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2472
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1279
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14970
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