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data structures
combine-tags-by-or
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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
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number theory
probabilities
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shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
794F
Leha and security system
data structures
2800
x738
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x367
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x533
792F
Mages and Monsters
data structures
,
geometry
3100
x201
788E
New task
data structures
2900
x333
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x610
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x139
786C
Till I Collapse
data structures
,
divide and conquer
2400
x2621
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5574
785E
Anton and Permutation
brute force
,
data structures
2200
x1836
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x652
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3927
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6312
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9378
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x425
776C
Molly's Chemicals
binary search
,
brute force
,
data structures
,
implementation
,
math
1800
x5836
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x217
773E
Blog Post Rating
data structures
,
sortings
3000
x337
768G
The Winds of Winter
binary search
,
data structures
3300
x355
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2206
767A
Snacktower
data structures
,
implementation
1100
x19617
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2903
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3306
765F
Souvenirs
data structures
3100
x1938
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x480
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x527
762E
Radio stations
binary search
,
data structures
2200
x1322
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x408
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x486
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1127
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2321
756C
Nikita and stack
data structures
2200
x1292
755D
PolandBall and Polygon
data structures
2000
x2479
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11026
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2209
750E
New Year and Old Subsequence
data structures
,
divide and conquer
,
dp
,
matrices
2600
x1521
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3068
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1036
749D
Leaving Auction
binary search
,
data structures
2000
x2532
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1454
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1828
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x730
741E
Arpa’s abnormal DNA and Mehrdad’s deep interest
data structures
,
string suffix structures
3400
x176
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2496
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2090
739C
Alyona and towers
data structures
2500
x1450
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4467
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1095
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x879
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4150
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2782
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1159
730L
Expression Queries
data structures
3200
x85
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2160
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1156
725D
Contest Balloons
data structures
,
greedy
1800
x2741
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2267
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x475
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3106
722C
Destroying Array
data structures
,
dsu
1600
x9063
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2303
720F
Array Covering
data structures
3100
x146
720D
Slalom
data structures
,
dp
,
sortings
3100
x227
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3500
717F
Heroes of Making Magic III
data structures
2600
x289
713D
Animals and Puzzle
binary search
,
data structures
2700
x1092
713A
Sonya and Queries
data structures
,
implementation
1400
x8361
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x606
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1728
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3079
707E
Garlands
data structures
2400
x1062
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2625
706E
Working routine
data structures
,
implementation
2500
x1126
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9684
704E
Iron Man
data structures
,
geometry
,
trees
3300
x279
704A
Thor
brute force
,
data structures
,
implementation
1600
x9033
703D
Mishka and Interesting sum
data structures
2100
x3471
702F
T-Shirts
data structures
2800
x1260
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2499
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11467
701B
Cells Not Under Attack
data structures
,
math
1200
x11613
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x457
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x494
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1247
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x6013
690B3
Recover Polygon (hard)
data structures
2600
x91
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1832
689D
Friends and Subsequences
binary search
,
data structures
2100
x3316
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x860
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3844
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7396
679E
Bear and Bad Powers of 42
data structures
3100
x673
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x857
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1542
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2645
675D
Tree Construction
data structures
,
trees
1800
x3724
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3494
671E
Organizing a Race
data structures
,
greedy
3300
x402
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1119
671C
Ultimate Weirdness of an Array
data structures
,
number theory
2800
x673
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