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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
06:15:16
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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
1137F
Matches Are Not a Child's Play
data structures
,
trees
3400
x466
1137E
Train Car Selection
data structures
,
greedy
2700
x501
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1535
1137C
Museums Tour
dp
,
graphs
,
implementation
2500
x1176
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x983
1131G
Most Dangerous Shark
data structures
,
dp
,
two pointers
2700
x422
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x421
1129D
Isolation
data structures
,
dp
2900
x970
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x911
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x254
1120E
The very same Munchhausen
brute force
2600
x116
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1300
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x411
1119H
Triple
fft
,
math
3200
x535
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x484
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x700
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x528
1117G
Recursive Queries
data structures
2500
x665
1117F
Crisp String
bitmasks
,
dp
2500
x522
1114F
Please, another Queries on Array?
bitmasks
,
data structures
,
divide and conquer
,
math
,
number theory
2400
x1883
1111E
Tree
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2500
x894
1111D
Destroy the Colony
combinatorics
,
dp
,
math
2600
x949
1110H
Modest Substrings
dp
,
strings
3500
x279
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x613
1110F
Nearest Leaf
data structures
,
trees
2600
x1702
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x289
1109E
Sasha and a Very Easy Test
data structures
,
number theory
2700
x498
1109D
Sasha and Interesting Fact from Graph Theory
brute force
,
combinatorics
,
dp
,
math
,
trees
2400
x1283
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x249
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1028
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x752
1107E
Vasya and Binary String
dp
2400
x2237
1106F
Lunar New Year and a Recursive Sequence
math
,
matrices
,
number theory
2400
x962
1103E
Radix sum
fft
,
math
,
number theory
3400
x225
1103D
Professional layer
bitmasks
,
dp
3100
x404
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x823
1101F
Trucks and Cities
binary search
,
dp
2400
x1304
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2207
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x840
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x914
1098F
Ж-function
string suffix structures
,
strings
3500
x218
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x220
1098D
Eels
data structures
2800
x764
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x971
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x94
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x696
1097F
Alex and a TV Show
bitmasks
,
combinatorics
,
number theory
2500
x1223
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x479
1096G
Lucky Tickets
divide and conquer
,
dp
,
fft
2400
x1429
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x942
1093F
Vasya and Array
dp
2400
x989
1093E
Intersection of Permutations
data structures
2400
x1559
1091H
New Year and the Tricolore Recreation
games
3200
x427
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x202
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x798
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x991
1090J
Two Prefixes
strings
2600
x423
1090H
Linearization
graphs
2900
x90
1090G
Combostone
games
,
implementation
2500
x105
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x315
1090C
New Year Presents
constructive algorithms
,
data structures
2400
x488
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x586
1089K
King Kog's Reception
data structures
2400
x1088
1089J
JS Minification
greedy
,
implementation
3200
x121
1089I
Interval-Free Permutations
combinatorics
2600
x370
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x110
1089D
Distance Sum
graphs
3100
x99
1089C
Cactus Search
interactive
2500
x405
1089B
Bimatching
graphs
3200
x216
1088F
Ehab and a weird weight formula
data structures
,
trees
2800
x507
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1463
1086F
Forest Fires
math
3500
x231
1085G
Beautiful Matrix
combinatorics
,
data structures
,
dp
2900
x512
1085F
Rock-Paper-Scissors Champion
2500
x581
1083F
The Fair Nut and Amusing Xor
data structures
3300
x272
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x4100
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x234
1083C
Max Mex
data structures
,
trees
2900
x862
1082G
Petya and Graph
flows
,
graphs
2400
x2022
1082F
Speed Dial
dp
,
strings
,
trees
2800
x414
1081H
Palindromic Magic
data structures
,
hashing
,
strings
3500
x102
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x345
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x456
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x693
1080E
Sonya and Matrix Beauty
strings
2400
x1049
1078E
Negative Time Summation
constructive algorithms
3400
x87
1076G
Array Game
data structures
,
games
3000
x497
1076F
Summer Practice Report
dp
,
greedy
2500
x629
1073G
Yet Another LCP Problem
data structures
,
string suffix structures
2600
x898
1073F
Choosing Two Paths
dfs and similar
,
dp
,
greedy
,
trees
2500
x530
1071E
Rain Protection
binary search
,
geometry
3500
x140
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x66
1070L
Odd Federalization
constructive algorithms
2600
x293
1070I
Privatization of Roads in Berland
flows
,
graph matchings
,
graphs
2400
x631
1070B
Berkomnadzor
data structures
,
greedy
2400
x587
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x434
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x376
1067C
Knights
constructive algorithms
2600
x617
1065G
Fibonacci Suffix
strings
2700
x244
1065F
Up and Down the Tree
dfs and similar
,
dp
,
trees
2500
x1152
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