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Codeforces Round 987 (Div. 2)
02:29:16
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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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Status
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Custom test
Problems
#
Name
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2463
336B
Vasily the Bear and Fly
math
1900
x1218
335F
Buy One, Get One Free
dp
,
greedy
3000
x556
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x225
335D
Rectangles and Square
brute force
,
dp
2400
x329
335C
More Reclamation
games
2100
x537
335B
Palindrome
constructive algorithms
,
dp
1900
x2110
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2584
334B
Eight Point Sets
sortings
1400
x3607
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1136
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x2112
333C
Lucky Tickets
brute force
,
constructive algorithms
2700
x392
333B
Chips
greedy
1800
x2652
333A
Secrets
greedy
1600
x4048
332E
Binary Key
dp
,
greedy
,
implementation
2400
x302
332D
Theft of Blueprints
graphs
,
math
2400
x385
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x915
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x8049
331E2
Deja Vu
constructive algorithms
,
dp
3100
x218
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x165
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x178
331D2
Escaping on Beaveractor
graphs
2600
x135
331D1
Escaping on Beaveractor
dfs and similar
,
implementation
2400
x205
331C3
The Great Julya Calendar
dp
2500
x498
331C2
The Great Julya Calendar
dp
2400
x388
331B2
Shave Beaver!
data structures
1900
x726
331B1
Shave Beaver!
implementation
1700
x738
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1422
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1384
329E
Evil
math
3100
x169
329D
The Evil Temple and the Moving Rocks
constructive algorithms
2500
x407
329C
Graph Reconstruction
constructive algorithms
2400
x910
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x6457
329A
Purification
constructive algorithms
,
greedy
1500
x4650
328B
Sheldon and Ice Pieces
greedy
1500
x1346
328A
IQ Test
implementation
1800
x2083
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1405
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2284
327C
Magic Five
combinatorics
,
math
1700
x3224
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x831
325D
Reclamation
dsu
2900
x539
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x350
325B
Stadium and Games
binary search
,
math
1800
x1568
325A
Square and Rectangles
implementation
1500
x2162
323C
Two permutations
data structures
2400
x599
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x401
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x744
322B
Ciel and Flowers
combinatorics
,
math
1600
x11865
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x5033
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x547
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x7394
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x3116
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3649
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7271
319E
Ping-Pong
data structures
3000
x660
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x666
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x5266
319B
Psychos in a Line
data structures
,
implementation
1900
x4188
319A
Malek Dance Club
combinatorics
,
math
1600
x2802
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x155
317D
Game with Powers
dp
,
games
2300
x1084
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x504
317B
Ants
brute force
,
implementation
2000
x1602
317A
Perfect Pair
brute force
1600
x4655
316G3
Good Substrings
string suffix structures
2400
x499
316G2
Good Substrings
string suffix structures
2200
x475
316G1
Good Substrings
hashing
,
strings
1700
x965
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x182
316F2
Suns and Rays
2300
x166
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x180
316E3
Summer Homework
data structures
,
math
2300
x533
316E2
Summer Homework
data structures
,
math
2300
x400
316E1
Summer Homework
brute force
,
data structures
1500
x1483
316D3
PE Lesson
dp
,
math
2400
x600
316D2
PE Lesson
dp
2300
x455
316D1
PE Lesson
brute force
,
dp
2300
x524
316C2
Tidying Up
flows
,
graph matchings
2300
x635
316C1
Tidying Up
flows
2200
x557
316B2
EKG
dfs and similar
,
dp
1600
x1590
316B1
EKG
brute force
,
dfs and similar
1500
x1376
316A2
Special Task
math
1400
x2143
315A
Sereja and Bottles
brute force
1400
x11202
314E
Sereja and Squares
dp
2900
x371
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x526
314C
Sereja and Subsequences
data structures
,
dp
2000
x1840
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1519
314A
Sereja and Contest
implementation
1600
x2077
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x553
313D
Ilya and Roads
dp
2100
x1475
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5652
311E
Biologist
flows
2300
x1207
311D
Interval Cubing
data structures
,
math
2600
x673
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x484
311B
Cats Transport
data structures
,
dp
2400
x3478
309E
Sheep
binary search
,
greedy
2900
x225
309D
Tennis Rackets
brute force
,
geometry
2700
x175
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1366
309B
Context Advertising
dp
,
two pointers
2100
x719
309A
Morning run
binary search
,
math
,
two pointers
2000
x488
306D
Polygon
constructive algorithms
,
geometry
2300
x284
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