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Rayan
→ Pay attention
Contest is running
Codeforces Round 1002 (Div. 2)
01:38:55
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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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Problems
#
Name
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x891
928B
Chat
*special problem
,
dp
1400
x2559
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
926J
Segments
data structures
2100
x401
926I
A Vital Problem
1700
x670
926H
Endless Roses Most Beautiful
2200
x222
926G
Large Bouquets
1500
x1495
926F
Mobile Communications
2000
x243
926E
Merge Equal Elements
constructive algorithms
,
data structures
1900
x937
926D
Choose Place
1600
x941
926C
Is This a Zebra?
implementation
1700
x1894
926B
Add Points
math
,
number theory
1800
x1774
925F
Parametric Circulation
binary search
,
flows
3100
x125
925E
May Holidays
data structures
,
trees
2900
x413
925D
Aztec Catacombs
constructive algorithms
2600
x529
925C
Big Secret
constructive algorithms
,
math
2200
x1324
925B
Resource Distribution
binary search
,
implementation
,
sortings
1700
x2218
925A
Stairs and Elevators
binary search
1600
x3596
924F
Minimal Subset Difference
dp
3200
x237
924E
Wardrobe
dp
,
greedy
2700
x522
924D
Contact ATC
2500
x877
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3903
924B
Three-level Laser
binary search
,
greedy
,
two pointers
1600
x5374
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x82
923E
Perpetual Subtraction
fft
,
math
,
matrices
3100
x463
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1209
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4364
923B
Producing Snow
binary search
,
data structures
1600
x7396
923A
Primal Sport
math
,
number theory
1700
x5062
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x649
922E
Birds
dp
2200
x2195
922D
Robot Vacuum Cleaner
greedy
,
sortings
1800
x4436
922C
Cave Painting
brute force
,
number theory
1600
x7241
92114
Labyrinth-14
3200
92113
Labyrinth-13
3200
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
920G
List Of Integers
binary search
,
bitmasks
,
brute force
,
combinatorics
,
math
,
number theory
2200
x1779
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x7139
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6621
920D
Tanks
dp
,
greedy
,
implementation
2400
x744
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x9449
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x344
919E
Congruence Equation
chinese remainder theorem
,
math
,
number theory
2100
x2179
919D
Substring
dfs and similar
,
dp
,
graphs
1700
x10442
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x141
917D
Stranger Trees
dp
,
math
,
matrices
,
trees
2600
x1234
917C
Pollywog
combinatorics
,
dp
,
matrices
2900
x408
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3586
917A
The Monster
dp
,
greedy
,
implementation
,
math
1800
x3540
916E
Jamie and Tree
data structures
,
trees
2400
x1743
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x521
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x5182
916B
Jamie and Binary Sequence (changed after round)
bitmasks
,
greedy
,
math
2000
x1924
915G
Coprime Arrays
math
,
number theory
2300
x1305
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2587
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4607
915D
Almost Acyclic Graph
dfs and similar
,
graphs
2200
x3554
915C
Permute Digits
dp
,
greedy
1700
x7143
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x241
914G
Sum the Fibonacci
bitmasks
,
divide and conquer
,
dp
,
fft
,
math
2600
x957
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1716
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1552
914D
Bash and a Tough Math Puzzle
data structures
,
number theory
1900
x5495
914C
Travelling Salesman and Special Numbers
brute force
,
combinatorics
,
dp
1800
x3875
913H
Don't Exceed
math
,
probabilities
3400
x128
913G
Power Substring
math
,
number theory
3200
x211
913F
Strongly Connected Tournament
dp
,
graphs
,
math
,
probabilities
2800
x670
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x814
913D
Too Easy Problems
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1800
x4840
913C
Party Lemonade
bitmasks
,
dp
,
greedy
1600
x8022
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1691
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x2028
912C
Perun, Ult!
brute force
,
greedy
,
sortings
2500
x523
911G
Mass Change Queries
data structures
2500
x3012
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1801
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2593
911D
Inversion Counting
brute force
,
math
1800
x4665
911C
Three Garlands
brute force
,
constructive algorithms
1400
x7089
910C
Minimum Sum
constructive algorithms
,
greedy
,
math
1700
x1835
910B
Door Frames
greedy
,
implementation
1600
x1720
909F
AND-permutations
constructive algorithms
2500
x586
909E
Coprocessor
dfs and similar
,
dp
,
graphs
,
greedy
1900
x2143
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1963
909C
Python Indentation
dp
1800
x5011
908H
New Year and Boolean Bridges
3100
x394
908G
New Year and Original Order
dp
,
math
2800
x1389
908F
New Year and Rainbow Roads
graphs
,
greedy
,
implementation
2400
x1415
908E
New Year and Entity Enumeration
bitmasks
,
combinatorics
,
dp
,
math
2500
x769
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2407
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