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Codeforces Round 1134 (Div. 4)
42:09:30
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x658
1089L
Lazyland
900
x4906
1089K
King Kog's Reception
data structures
2400
x1276
1089J
JS Minification
greedy
,
implementation
3200
x149
1089I
Interval-Free Permutations
combinatorics
2600
x490
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x131
1089G
Guest Student
math
1500
x3288
1089F
Fractions
math
1900
x2187
1089E
Easy Chess
constructive algorithms
1700
x2184
1089D
Distance Sum
graphs
3100
x119
1089C
Cactus Search
interactive
2500
x466
1089B
Bimatching
graphs
3200
x254
1089A
Alice the Fan
dp
2200
x1293
1088F
Ehab and a weird weight formula
data structures
,
trees
2800
x670
1088E
Ehab and a component choosing problem
dp
,
greedy
,
math
,
trees
2400
x1677
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x3275
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8579
1088B
Ehab and subtraction
implementation
,
sortings
1000
x13791
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x17792
1086F
Forest Fires
math
3500
x463
1085G
Beautiful Matrix
combinatorics
,
data structures
,
dp
2900
x1074
1085F
Rock-Paper-Scissors Champion
2500
x808
1085E
Vasya and Templates
greedy
,
implementation
,
strings
2300
x1166
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x6021
1085C
Connect Three
implementation
,
math
1600
x5715
1085B
Div Times Mod
math
1100
x10386
1085A
Right-Left Cipher
implementation
,
strings
800
x12804
1084C
The Fair Nut and String
combinatorics
,
dp
,
implementation
1500
x13034
1084B
Kvass and the Fair Nut
greedy
,
implementation
1200
x8369
1084A
The Fair Nut and Elevator
brute force
,
implementation
1000
x8373
1083F
The Fair Nut and Amusing Xor
data structures
3300
x493
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x6203
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x649
1083C
Max Mex
data structures
,
trees
2900
x1221
1083B
The Fair Nut and Strings
greedy
,
strings
2000
x2318
1083A
The Fair Nut and the Best Path
data structures
,
dp
,
trees
1800
x6587
1082G
Petya and Graph
flows
,
graphs
2400
x2973
1082F
Speed Dial
dp
,
strings
,
trees
2800
x652
1082E
Increasing Frequency
binary search
,
dp
,
greedy
2000
x7083
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x4216
1082C
Multi-Subject Competition
greedy
,
sortings
1600
x6280
1082B
Vova and Trophies
greedy
1600
x8117
1082A
Vasya and Book
implementation
,
math
1200
x9515
1081H
Palindromic Magic
data structures
,
hashing
,
strings
3500
x137
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x526
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x578
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2867
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x4927
1081C
Colorful Bricks
combinatorics
,
dp
,
math
1500
x8894
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4729
1081A
Definite Game
constructive algorithms
,
math
800
x13407
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x1033
1080E
Sonya and Matrix Beauty
strings
2400
x1402
1080D
Olya and magical square
constructive algorithms
,
implementation
,
math
2000
x1704
1080C
Masha and two friends
implementation
1500
x4262
1080B
Margarite and the best present
math
900
x12821
1080A
Petya and Origami
math
800
x19367
1078E
Negative Time Summation
constructive algorithms
3400
x110
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x4664
1077F1
Pictures with Kittens (easy version)
dp
1900
x5740
1077E
Thematic Contests
greedy
,
sortings
1800
x5220
1077D
Cutting Out
binary search
,
sortings
1600
x10815
1077C
Good Array
1300
x28420
1077B
Disturbed People
greedy
1000
x20818
1077A
Frog Jumping
math
800
x32903
1076G
Array Game
data structures
,
games
3000
x813
1076F
Summer Practice Report
dp
,
greedy
2500
x780
1076E
Vasya and a Tree
data structures
,
trees
1900
x4337
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x6375
1076C
Meme Problem
binary search
,
math
1300
x13680
1076B
Divisor Subtraction
implementation
,
math
,
number theory
1200
x15072
1076A
Minimizing the String
greedy
,
strings
1200
x14471
1075B
Taxi drivers and Lyft
implementation
,
sortings
1200
x4633
1075A
The King's Race
implementation
,
math
800
x9230
1073G
Yet Another LCP Problem
data structures
,
string suffix structures
2600
x1201
1073F
Choosing Two Paths
dfs and similar
,
dp
,
greedy
,
trees
2500
x681
1073E
Segment Sum
bitmasks
,
combinatorics
,
dp
,
math
2300
x4028
1073D
Berland Fair
binary search
,
brute force
,
data structures
,
greedy
1700
x6805
1073C
Vasya and Robot
binary search
,
two pointers
1800
x5632
1073B
Vasya and Books
implementation
,
math
1000
x11359
1073A
Diverse Substring
implementation
,
strings
1000
x17462
1071E
Rain Protection
binary search
,
geometry
3500
x388
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x94
1070L
Odd Federalization
constructive algorithms
2600
x441
1070K
Video Posts
implementation
1100
x5472
1070J
Streets and Avenues in Berhattan
dp
2300
x831
1070I
Privatization of Roads in Berland
flows
,
graph matchings
,
graphs
2400
x816
1070H
BerOS File Suggestion
brute force
,
implementation
1500
x3893
1070G
Monsters and Potions
brute force
,
dp
,
greedy
,
implementation
2300
x966
1070F
Debate
greedy
1500
x3890
1070E
Getting Deals Done
binary search
,
data structures
2100
x1510
1070D
Garbage Disposal
greedy
1300
x5289
1070C
Cloud Computing
data structures
,
greedy
2000
x2392
1070B
Berkomnadzor
data structures
,
greedy
2400
x733
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2715
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3390
1068B
LCM
math
,
number theory
1200
x13463
1068A
Birthday
math
1400
x7376
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x655
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x764
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