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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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Status
Standings
Custom test
Problems
#
Name
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1126
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4499
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x427
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6580
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3179
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x762
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4530
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1288
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x1875
817F
MEX Queries
binary search
,
data structures
,
trees
2300
x2405
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7048
816B
Karen and Coffee
binary search
,
data structures
,
implementation
1400
x16446
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x218
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x595
813E
Army Creation
binary search
,
data structures
2200
x2270
812C
Sagheer and Nubian Market
binary search
,
sortings
1500
x13153
809B
Glad to see you!
binary search
,
interactive
2200
x1437
808F
Card Game
binary search
,
flows
,
graphs
2400
x1090
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1751
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6737
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1257
803D
Magazine Ad
binary search
,
greedy
1900
x3074
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x826
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1098
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x107
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3591
796E
Exam Cheating
binary search
,
dp
2400
x625
785C
Anton and Fairy Tale
binary search
,
math
1600
x7190
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x116
780B
The Meeting Place Cannot Be Changed
binary search
1600
x8964
778A
String Game
binary search
,
greedy
,
strings
1700
x11111
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4913
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6278
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5743
774L
Bars
*special problem
,
binary search
2000
x322
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
773C
Prairie Partition
binary search
,
constructive algorithms
,
greedy
,
math
2200
x937
773A
Success Rate
binary search
,
math
1700
x4369
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x122
772A
Voltage Keepsake
binary search
,
math
1800
x4077
768G
The Winds of Winter
binary search
,
data structures
3300
x353
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2194
762E
Radio stations
binary search
,
data structures
2200
x1283
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2365
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3943
760B
Frodo and pillows
binary search
,
greedy
1500
x6078
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3822
756B
Travel Card
binary search
,
dp
1600
x3307
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10923
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2135
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6489
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70974
749D
Leaving Auction
binary search
,
data structures
2000
x2524
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1441
743E
Vladik and cards
binary search
,
bitmasks
,
brute force
,
dp
2200
x1472
743B
Chloe and the sequence
binary search
,
bitmasks
,
constructive algorithms
,
implementation
1200
x14218
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4425
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5288
732D
Exams
binary search
,
greedy
,
sortings
1700
x5404
732C
Sanatorium
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x9473
730C
Bulmart
binary search
,
dfs and similar
2100
x1004
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3848
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x763
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3086
721E
Road to Home
binary search
,
dp
2700
x301
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2658
713E
Sonya Partymaker
binary search
,
dp
3300
x342
713D
Animals and Puzzle
binary search
,
data structures
2700
x1077
713B
Searching Rectangles
binary search
,
constructive algorithms
,
interactive
2200
x1420
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9289
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58471
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x13160
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13773
700A
As Fast As Possible
binary search
,
math
1900
x3143
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x119
689D
Friends and Subsequences
binary search
,
data structures
2100
x3063
689C
Mike and Chocolate Thieves
binary search
,
combinatorics
,
math
1700
x4887
685C
Optimal Point
binary search
,
math
2900
x576
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2113
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x582
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18139
671B
Robin Hood
binary search
,
greedy
2000
x2967
670D2
Magic Powder - 2
binary search
,
implementation
1500
x13081
670D1
Magic Powder - 1
binary search
,
brute force
,
implementation
1400
x16043
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1512
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9063
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2337
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1192
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3309
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x103
645G
Armistice Area Apportionment
binary search
,
geometry
3200
x111
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2765
645C
Enduring Exodus
binary search
,
two pointers
1600
x3155
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
639E
Bear and Paradox
binary search
,
greedy
,
math
,
sortings
2800
x567
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x15058
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x568
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x795
626E
Simple Skewness
binary search
,
math
,
ternary search
2400
x1296
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