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Problems
#
Name
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x182
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1182
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3059
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6015
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16557
1934A
Too Min Too Max
greedy
,
math
800
x23282
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x862
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2194
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9650
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17686
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20398
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29797
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35299
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x873
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3364
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6744
1932D
Card Game
greedy
,
implementation
1400
x9835
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13593
1932B
Chaya Calendar
number theory
1100
x18301
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26591
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2428
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x6904
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13255
1931D
Divisible Pairs
combinatorics
,
math
,
number theory
1300
x15758
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25954
1931B
Make Equal
greedy
800
x29911
1931A
Recovering a Small String
brute force
,
strings
800
x33458
1930I
Counting Is Fun
combinatorics
3500
x50
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x119
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x246
1930F
Maximize the Difference
bitmasks
,
brute force
,
dfs and similar
2700
x610
1930E
2..3...4.... Wonderful! Wonderful!
combinatorics
,
dp
,
math
2400
x982
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2356
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3672
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6386
1930B
Permutation Printing
brute force
,
constructive algorithms
,
math
1000
x13541
1930A
Maximise The Score
greedy
,
sortings
800
x17101
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1618
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1502
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4153
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13181
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23731
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28812
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x209
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1534
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3722
1928C
Physical Education Lesson
brute force
,
math
,
number theory
1600
x7444
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15192
1928A
Rectangle Cutting
geometry
,
math
800
x21107
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1488
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3770
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12345
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18198
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25489
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30273
1927A
Make it White
greedy
,
strings
800
x39605
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2927
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1472
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9937
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13465
1926C
Vlad and a Sum of Sum of Digits
dp
,
implementation
1200
x22965
1926B
Vlad and Shapes
geometry
,
implementation
800
x29624
1926A
Vlad and the Best of Five
implementation
800
x41814
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3205
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18169
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27105
1924F
Anti-Proxy Attendance
constructive algorithms
,
dp
,
interactive
,
ternary search
3500
x127
1924E
Paper Cutting Again
combinatorics
,
probabilities
3100
x390
1924D
Balanced Subsequences
combinatorics
,
dp
,
math
2700
x769
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1035
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2270
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12296
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x328
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3158
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5865
1923C
Find B
constructive algorithms
,
greedy
1400
x13066
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x16101
1923A
Moving Chips
greedy
,
implementation
800
x23195
1922F
Replace on Segment
dp
,
graph matchings
2500
x1161
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x7027
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5213
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16822
1922B
Forming Triangles
combinatorics
,
constructive algorithms
,
math
,
sortings
1200
x18974
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25850
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1116
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3429
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8887
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19926
1921C
Sending Messages
greedy
,
math
900
x27241
1921B
Arranging Cats
greedy
,
implementation
800
x31926
1921A
Square
greedy
,
math
800
x39837
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x398
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x872
1920E
Counting Binary Strings
combinatorics
,
dp
,
math
2100
x2349
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5082
1920C
Partitioning the Array
brute force
,
math
,
number theory
1600
x11776
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19223
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x26436
1919H
Tree Diameter
interactive
,
trees
2000
x128
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x170
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binary search
bitmasks
brute force
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divide and conquer
dp
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