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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
25:53:55
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Difficulty:
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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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Custom test
Problems
#
Name
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3904
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x13051
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13921
1902A
Binary Imbalance
constructive algorithms
800
x20453
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x149
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1451
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6556
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x11405
1901B
Chip and Ribbon
greedy
,
math
1100
x14514
1901A
Line Trip
greedy
,
math
800
x28341
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x276
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1951
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3956
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x11034
1900B
Laura and Operations
dp
,
math
900
x16827
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x24627
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x3055
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x7167
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x14800
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x12982
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x19680
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x19456
1899A
Game with Integers
games
,
math
,
number theory
800
x41765
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x781
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2167
1898D
Absolute Beauty
greedy
,
math
1900
x5006
1898C
Colorful Grid
constructive algorithms
1700
x5217
1898B
Milena and Admirer
greedy
,
math
1500
x11233
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15583
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x98
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x87
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x325
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x694
1896E
Permutation Sorting
data structures
,
sortings
2100
x2138
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5479
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x9189
1896B
AB Flipping
greedy
,
strings
,
two pointers
900
x14165
1896A
Jagged Swaps
sortings
800
x21225
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x182
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x707
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1518
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5816
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10605
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20117
1895A
Treasure Chest
math
800
x23989
1894B
Two Out of Three
constructive algorithms
1000
x15347
1894A
Secret Sport
implementation
,
strings
800
x18582
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x188
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x850
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x2546
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8522
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11848
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3568
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x801
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3846
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x12375
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x16949
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x18899
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17177
1890A
Doremy's Paint 3
constructive algorithms
800
x24227
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x73
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x106
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x547
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x932
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3144
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x7080
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x12643
1887F
Minimum Segments
constructive algorithms
3400
x125
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x344
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x849
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1660
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2837
1886F
Diamond Theft
data structures
,
greedy
3300
x163
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1396
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3457
1886C
Decreasing String
implementation
,
strings
1600
x10945
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15728
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x25295
1885A
Deterministic Scheduling for Extended Reality over 5G and Beyond
*special problem
1884E
Hard Design
greedy
,
implementation
,
math
2800
x274
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x3047
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5834
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x12331
1884A
Simple Design
brute force
,
greedy
,
math
800
x17120
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x5160
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x10135
1883F
You Are So Beautiful
data structures
1400
x8984
1883E
Look Back
bitmasks
,
greedy
1700
x7677
1883D
In Love
data structures
,
greedy
1500
x10886
1883C
Raspberries
dp
,
math
1000
x25169
1883B
Chemistry
strings
900
x29612
1883A
Morning
math
800
x25005
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x289
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x990
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x5212
1882C
Card Game
brute force
,
greedy
1500
x11883
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x15008
1882A
Increasing Sequence
greedy
800
x24968
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2264
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x6483
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