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Codeforces Round 951 (Div. 2)
32:19:44
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Difficulty:
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binary search
combine-tags-by-or
*combine tags by OR
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
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Status
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Custom test
Problems
#
Name
846D
Monitor
binary search
,
data structures
1900
x2370
845E
Fire in the City
binary search
,
data structures
2400
x581
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x398
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3256
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x746
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1520
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1129
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4592
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x428
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6647
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3187
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x770
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4538
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1351
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x2008
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2426
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7091
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x16631
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x219
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x598
813E
Army Creation
binary search
,
data structures
2200
x2288
812C
Sagheer and Nubian Market
binary search
,
sortings
1500
x13223
809B
Glad to see you!
binary search
,
interactive
2200
x1467
808F
Card Game
binary search
,
flows
,
graphs
2400
x1103
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1757
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6791
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1259
803D
Magazine Ad
binary search
,
greedy
1900
x3096
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x848
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1117
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x111
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3661
796E
Exam Cheating
binary search
,
dp
2400
x639
785C
Anton and Fairy Tale
binary search
,
math
1600
x7221
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x117
780B
The Meeting Place Cannot Be Changed
binary search
1600
x9063
778A
String Game
binary search
,
greedy
,
strings
1700
x11166
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4926
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6291
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5780
774L
Bars
*special problem
,
binary search
2000
x324
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x105
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x217
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x938
773A
Success Rate
binary search
,
math
1700
x4384
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x123
772A
Voltage Keepsake
binary search
,
math
1800
x4081
768G
The Winds of Winter
binary search
,
data structures
3300
x355
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2199
762E
Radio stations
binary search
,
data structures
2200
x1294
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2380
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3946
760B
Frodo and pillows
binary search
,
greedy
1500
x6248
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3823
756B
Travel Card
binary search
,
dp
1600
x3354
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10975
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2139
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6498
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71672
749D
Leaving Auction
binary search
,
data structures
2000
x2528
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1443
743E
Vladik and cards
binary search
,
bitmasks
,
brute force
,
dp
2200
x1480
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14306
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4455
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5295
732D
Exams
binary search
,
greedy
,
sortings
1700
x5414
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9481
730C
Bulmart
binary search
,
dfs and similar
2100
x1063
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3856
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x770
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3099
721E
Road to Home
binary search
,
dp
2700
x302
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2673
713E
Sonya Partymaker
binary search
,
dp
3300
x344
713D
Animals and Puzzle
binary search
,
data structures
2700
x1081
713B
Searching Rectangles
binary search
,
constructive algorithms
,
interactive
2200
x1421
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9435
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x59105
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x13343
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13962
700A
As Fast As Possible
binary search
,
math
1900
x3149
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x120
689D
Friends and Subsequences
binary search
,
data structures
2100
x3125
689C
Mike and Chocolate Thieves
binary search
,
combinatorics
,
math
1700
x4951
685C
Optimal Point
binary search
,
math
2900
x577
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2115
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x586
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18250
671B
Robin Hood
binary search
,
greedy
2000
x2969
670D2
Magic Powder - 2
binary search
,
implementation
1500
x13260
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x16290
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1536
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9131
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2353
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1201
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3310
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x104
645G
Armistice Area Apportionment
binary search
,
geometry
3200
x112
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2773
645C
Enduring Exodus
binary search
,
two pointers
1600
x3167
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