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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
10:11:02
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Difficulty:
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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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Custom test
Problems
#
Name
1611G
Robot and Candies
data structures
,
graph matchings
,
greedy
2500
x634
1610I
Mashtali vs AtCoder
games
,
trees
3100
x278
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x475
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x432
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x515
1610E
AmShZ and G.O.A.T.
binary search
,
brute force
,
greedy
,
implementation
,
math
2300
x1651
1610D
Not Quite Lee
combinatorics
,
dp
,
math
,
number theory
2000
x2658
1609H
Pushing Robots
3500
x90
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x372
1609F
Interesting Sections
data structures
,
divide and conquer
,
meet-in-the-middle
,
two pointers
2800
x746
1609E
William The Oblivious
bitmasks
,
data structures
,
dp
,
matrices
2400
x1977
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x152
1608F
MEX counting
combinatorics
,
dp
,
implementation
3200
x575
1608E
The Cells on the Paper
binary search
,
implementation
,
sortings
2800
x431
1608D
Dominoes
combinatorics
,
fft
,
graphs
,
math
,
number theory
2400
x1367
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1221
1607G
Banquet Preparations 1
greedy
2200
x1540
1607F
Robot on the Board 2
brute force
,
dfs and similar
,
graphs
,
implementation
2300
x1911
1606F
Tree Queries
brute force
,
dp
,
trees
2800
x540
1606E
Arena
combinatorics
,
dp
,
math
2100
x3443
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1416
1605F
PalindORme
combinatorics
,
dp
2900
x296
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x1017
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2872
1603F
October 18, 2017
combinatorics
,
dp
,
implementation
,
math
2700
x271
1603E
A Perfect Problem
combinatorics
,
dp
,
math
3200
x412
1603D
Artistic Partition
divide and conquer
,
dp
,
number theory
3000
x649
1603C
Extreme Extension
dp
,
greedy
,
math
,
number theory
2300
x2008
1601F
Two Sorts
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
3400
x173
1601E
Phys Ed Online
data structures
,
dp
,
greedy
2900
x470
1601D
Difficult Mountain
data structures
,
dp
,
greedy
,
sortings
2700
x1421
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1975
1600F
Party Organization
brute force
,
math
,
probabilities
2300
x472
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x287
1599I
Desert
data structures
,
graphs
2700
x115
1599H
Hidden Fortress
interactive
,
math
2100
x1033
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x364
1599F
Mars
hashing
2700
x311
1599E
Two Arrays
data structures
,
matrices
3200
x67
1599D
Bubble Popping
3200
x30
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1626
1599B
Restaurant Game
3100
x137
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x639
1598G
The Sum of Good Numbers
hashing
,
math
,
string suffix structures
,
strings
3200
x328
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1398
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2272
1594F
Ideal Farm
constructive algorithms
,
math
2400
x1283
1594E2
Rubik's Cube Coloring (hard version)
brute force
,
dp
,
implementation
,
math
,
trees
2300
x1465
1593G
Changing Brackets
constructive algorithms
,
data structures
,
dp
,
greedy
2200
x1664
1593F
Red-Black Number
dfs and similar
,
dp
,
implementation
,
math
,
meet-in-the-middle
2100
x2399
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x699
1592F1
Alice and Recoloring 1
constructive algorithms
,
greedy
2600
x807
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1574
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2197
1588F
Jumping Through the Array
binary search
,
data structures
,
graphs
,
two pointers
3500
x275
1586I
Omkar and Mosaic
combinatorics
,
constructive algorithms
,
math
3500
x191
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x175
1585F
Non-equal Neighbours
combinatorics
,
dp
,
math
2400
x1187
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x1037
1584G
Eligible Segments
geometry
3200
x205
1584F
Strange LCS
bitmasks
,
dp
,
graphs
,
greedy
,
strings
2600
x905
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1249
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3620
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x319
1583G
Omkar and Time Travel
data structures
,
math
3000
x433
1583F
Defender of Childhood Dreams
bitmasks
,
constructive algorithms
,
divide and conquer
2500
x1258
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2180
1582G
Kuzya and Homework
data structures
,
number theory
2600
x575
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1758
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3664
1580F
Problems for Codeforces
combinatorics
,
fft
,
math
3300
x131
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x72
1580D
Subsequence
brute force
,
divide and conquer
,
dp
,
greedy
,
trees
2900
x837
1580C
Train Maintenance
brute force
,
data structures
,
implementation
2200
x1724
1580B
Mathematics Curriculum
brute force
,
combinatorics
,
dp
,
trees
2600
x1006
1579G
Minimal Coverage
dp
2200
x2318
1578M
The Mind
constructive algorithms
,
interactive
,
probabilities
2700
x441
1578L
Labyrinth
binary search
,
dsu
,
greedy
2400
x1074
1578K
Kingdom of Islands
brute force
,
graphs
,
implementation
2800
x348
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x225
1578I
Interactive Rays
geometry
,
interactive
3300
x59
1578G
Game of Chance
math
,
probabilities
3500
x36
1578F
Framing Pictures
geometry
2900
x148
1578D
Dragon Curve
3200
x44
1578C
Cactus Lady and her Cing
3500
x9
1578B
Building Forest Trails
data structures
,
dsu
2800
x329
1578A
Anti-Tetris
constructive algorithms
,
graphs
,
shortest paths
2800
x337
1575M
Managing Telephone Poles
data structures
,
geometry
2400
x244
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1331
1575K
Knitting Batik
implementation
,
math
2200
x672
1575I
Illusions of the Desert
data structures
,
trees
2300
x855
1575H
Holiday Wall Ornaments
dp
,
strings
2200
x598
1575G
GCD Festival
math
,
number theory
2200
x665
1575F
Finding Expected Value
math
2900
x112
1575E
Eye-Pleasing City Park Tour
data structures
,
trees
2600
x323
1575C
Cyclic Sum
data structures
,
fft
,
number theory
3000
x159
1575B
Building an Amusement Park
binary search
,
geometry
2300
x459
1574F
Occurrences
combinatorics
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
2700
x597
1574E
Coloring
combinatorics
,
constructive algorithms
,
implementation
,
math
2500
x888
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4424
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