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Pinely Round 4 (Div. 1 + Div. 2)
35:10:53
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Difficulty:
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data structures
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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Problems
#
Name
1996G
Penacony
brute force
,
data structures
,
dp
,
hashing
x401
1995E2
Let Me Teach You a Lesson (Hard Version)
bitmasks
,
data structures
,
dp
,
graphs
,
matrices
,
two pointers
x122
1995E1
Let Me Teach You a Lesson (Easy Version)
data structures
,
dp
,
matrices
,
two pointers
x182
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
x6152
1990F
Polygonal Segments
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
two pointers
x147
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
x600
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
x656
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5007
1988E
Range Minimum Sum
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
2300
x1029
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x2791
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x868
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1225
1986C
Update Queries
data structures
,
greedy
,
sortings
1100
x20953
1986B
Matrix Stabilization
brute force
,
data structures
,
greedy
,
sortings
1000
x24337
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
2200
x1286
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
1700
x4717
1985F
Final Boss
binary search
,
data structures
1500
x13088
1983F
array-value
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
2500
x963
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x7081
1982F
Sorting Problem Again
binary search
,
data structures
,
sortings
2600
x803
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x6204
1982C
Boring Day
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1200
x15275
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x218
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x712
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x1036
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x3343
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x9314
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x1246
1978F
Large Graph
data structures
,
dfs and similar
,
dsu
,
graphs
,
number theory
,
two pointers
2400
x1139
1978E
Computing Machine
brute force
,
data structures
,
dp
,
greedy
,
implementation
2000
x3257
1978D
Elections
data structures
,
greedy
,
implementation
,
math
1600
x9798
1978C
Manhattan Permutations
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1300
x13270
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x6036
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x477
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
2500
x887
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
2000
x3685
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x2015
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3786
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x3226
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x14512
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x12900
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x8299
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1209
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x4084
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1740
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x3855
1968F
Equal XOR Segments
binary search
,
data structures
1800
x4928
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x54
1967C
Fenwick Tree
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
math
,
trees
2300
x1530
1965F
Conference
data structures
,
flows
3300
x139
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x364
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x417
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x315
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x20693
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x14361
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x26280
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x2047
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x720
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x13701
1946F
Nobody is needed
2-sat
,
data structures
,
dfs and similar
,
dp
2500
x854
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x580
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x697
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3926
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x83
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x654
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2643
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8982
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x127
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x35
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x466
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1209
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2655
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x425
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1280
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7731
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3794
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x14891
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x323
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6749
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1711
1928F
Digital Patterns
combinatorics
,
data structures
,
implementation
,
math
2900
x229
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x4016
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1580
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x4125
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x19922
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x11148
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2402
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3500
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x6358
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5458
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1188
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3650
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x20906
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x434
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x919
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x786
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x2099
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3717
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x17902
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4529
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