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Codeforces Round 1002 (Div. 2)
2 days
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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
398E
Sorting Permutations
x95
398D
Instant Messanger
data structures
x968
398C
Tree and Array
constructive algorithms
x214
398B
Painting The Wall
dp
,
probabilities
x1074
398A
Cards
constructive algorithms
,
implementation
x928
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x761
397A
On Segment's Own Points
implementation
x2643
396E
On Iteration of One Well-Known Function
math
x155
396D
On Sum of Number of Inversions in Permutations
combinatorics
,
math
x439
396C
On Changing Tree
data structures
,
graphs
,
trees
x1648
396B
On Sum of Fractions
math
,
number theory
x1111
396A
On Number of Decompositions into Multipliers
combinatorics
,
math
,
number theory
x1525
394E
Lightbulb for Minister
geometry
x117
394D
Physical Education and Buns
brute force
,
implementation
,
math
x271
394C
Dominoes
constructive algorithms
,
greedy
x521
394B
Very Beautiful Number
math
x575
394A
Counting Sticks
brute force
,
implementation
x2668
393B
Three matrices
x2004
393A
Nineteen
x6703
392E
Deleting Substrings
x179
392D
Three Arrays
data structures
x218
392C
Yet Another Number Sequence
combinatorics
,
math
,
matrices
x601
392B
Tower of Hanoi
dp
x959
392A
Blocked Points
math
x979
391F3
Stock Trading
x108
391F2
Stock Trading
greedy
x109
391F1
Stock Trading
dp
x190
391E2
Three Trees
x168
391E1
Three Trees
x121
391D2
Supercollider
data structures
x198
391D1
Supercollider
brute force
x214
391C3
The Tournament
x171
391C2
The Tournament
greedy
x138
391C1
The Tournament
brute force
x189
391B
Word Folding
brute force
x396
391A
Genetic Engineering
implementation
,
two pointers
x1725
390E
Inna and Large Sweet Matrix
x261
390D
Inna and Sweet Matrix
constructive algorithms
x519
390C
Inna and Candy Boxes
data structures
x628
390B
Inna, Dima and Song
implementation
x1179
390A
Inna and Alarm Clock
implementation
x3604
389B
Fox and Cross
greedy
,
implementation
1100
x7025
389A
Fox and Number Game
greedy
,
math
1000
x14264
388E
Fox and Meteor Shower
geometry
3100
x122
388D
Fox and Perfect Sets
math
2700
x456
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3469
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2495
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11552
387E
George and Cards
binary search
,
data structures
2200
x925
387D
George and Interesting Graph
graph matchings
2200
x1035
387C
George and Number
greedy
,
implementation
1700
x2221
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x12397
387A
George and Sleep
implementation
900
x9854
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x465
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x831
386B
Fly, freebies, fly!
binary search
,
brute force
,
implementation
1400
x2207
386A
Second-Price Auction
implementation
800
x6659
385E
Bear in the Field
math
,
matrices
2300
x598
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x817
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9819
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x10083
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16644
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3591
384A
Coder
implementation
800
x16531
383E
Vowels
combinatorics
,
divide and conquer
,
dp
2700
x3251
383D
Antimatter
dp
2300
x3081
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6661
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x706
383A
Milking cows
data structures
,
greedy
1600
x5328
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x385
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x690
382C
Arithmetic Progression
implementation
,
sortings
1700
x8372
382B
Number Busters
binary search
,
math
2000
x1422
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x12651
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6879
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x69977
380E
Sereja and Dividing
data structures
2600
x309
380D
Sereja and Cinema
combinatorics
,
math
2500
x480
380C
Sereja and Brackets
data structures
,
schedules
2000
x15855
380B
Sereja and Tree
graphs
,
implementation
2400
x540
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2720
379G
New Year Cactus
dp
3100
x144
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2387
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x360
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1596
379C
New Year Ratings Change
greedy
,
sortings
1400
x6742
379B
New Year Present
constructive algorithms
,
implementation
1200
x7413
379A
New Year Candles
implementation
1000
x47858
378B
Semifinals
implementation
,
sortings
1300
x5322
378A
Playing with Dice
brute force
800
x24465
377E
Cookie Clicker
dp
,
geometry
2800
x483
377D
Developing Game
data structures
2400
x1206
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1165
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2134
377A
Maze
dfs and similar
1600
x23168
376B
I.O.U.
implementation
1300
x6479
376A
Lever
implementation
,
math
900
x9428
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x422
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x7115
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x572
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