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Name
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x29357
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x215
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1579
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3825
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7675
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15617
1928A
Rectangle Cutting
geometry
,
math
800
x21433
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1517
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3879
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12654
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18699
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25951
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30798
1927A
Make it White
greedy
,
strings
800
x40198
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x3052
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1529
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10373
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13931
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x23748
1926B
Vlad and Shapes
geometry
,
implementation
800
x30225
1926A
Vlad and the Best of Five
implementation
800
x42973
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3289
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18514
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27428
1924F
Anti-Proxy Attendance
constructive algorithms
,
dp
,
interactive
,
ternary search
3500
x134
1924E
Paper Cutting Again
combinatorics
,
probabilities
3100
x398
1924D
Balanced Subsequences
combinatorics
,
dp
,
math
2700
x790
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1059
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2310
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12573
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x338
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3278
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x6052
1923C
Find B
constructive algorithms
,
greedy
1400
x13477
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x16444
1923A
Moving Chips
greedy
,
implementation
800
x23494
1922F
Replace on Segment
dp
,
graph matchings
2500
x1182
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x7160
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5285
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x17098
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x19280
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x26050
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1143
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3504
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x9033
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20248
1921C
Sending Messages
greedy
,
math
900
x27614
1921B
Arranging Cats
greedy
,
implementation
800
x32237
1921A
Square
greedy
,
math
800
x40402
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x420
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x896
1920E
Counting Binary Strings
combinatorics
,
dp
,
math
2100
x2409
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5169
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x12042
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19491
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26682
1919H
Tree Diameter
interactive
,
trees
2000
x133
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x171
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x750
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x2046
1919E
Counting Prefixes
combinatorics
,
constructive algorithms
,
dp
,
implementation
,
math
2600
x786
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3635
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x17087
1919B
Plus-Minus Split
greedy
800
x28950
1919A
Wallet Exchange
games
,
math
800
x31959
1918G
Permutation of Given
constructive algorithms
,
math
2700
x430
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x793
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1596
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4342
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x12777
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x22369
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28966
1917F
Construct Tree
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x908
1917E
Construct Matrix
constructive algorithms
,
math
2500
x1283
1917D
Yet Another Inversions Problem
combinatorics
,
data structures
,
dp
,
implementation
,
math
,
number theory
2300
x1678
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9531
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19770
1917A
Least Product
constructive algorithms
,
math
800
x24372
1916H2
Matrix Rank (Hard Version)
combinatorics
,
dp
,
math
,
matrices
,
string suffix structures
2700
x503
1916H1
Matrix Rank (Easy Version)
brute force
,
combinatorics
,
dp
,
math
,
matrices
2700
x585
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x134
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x411
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2116
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x7970
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16859
1916B
Two Divisors
constructive algorithms
,
math
,
number theory
1000
x23941
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24715
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5524
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11873
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18911
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x28076
1915C
Can I Square?
binary search
,
implementation
800
x38221
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x39087
1915A
Odd One Out
bitmasks
,
implementation
800
x50804
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1240
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1699
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3744
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11398
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11290
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18643
←
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binary search
bitmasks
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dfs and similar
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graphs
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strings
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