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math
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
#
Name
1220B
Multiplication Table
math
,
number theory
1300
x11657
1217E
Sum Queries?
data structures
,
greedy
,
implementation
,
math
2300
x1899
1217B
Zmei Gorynich
greedy
,
math
1600
x11301
1217A
Creating a Character
binary search
,
math
1300
x15057
1216E2
Numerical Sequence (hard version)
binary search
,
math
2200
x1493
1216E1
Numerical Sequence (easy version)
binary search
,
brute force
,
math
1900
x3467
1216D
Swords
math
1300
x11182
1216C
White Sheet
geometry
,
math
1700
x9331
1215D
Ticket Game
games
,
greedy
,
math
1700
x6205
1215A
Yellow Cards
greedy
,
implementation
,
math
1000
x11595
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2710
1214B
Badges
brute force
,
math
1100
x10882
1214A
Optimal Currency Exchange
brute force
,
math
1400
x9124
1213D2
Equalizing by Division (hard version)
brute force
,
math
,
sortings
1600
x11489
1213C
Book Reading
math
1200
x18550
1213A
Chips Moving
math
900
x24169
1211G
King's Path
*special problem
,
math
,
trees
2500
x71
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x230
1210E
Wojtek and Card Tricks
math
2700
x408
1210C
Kamil and Making a Stream
math
,
number theory
,
trees
2000
x3356
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x142
1209B
Koala and Lights
implementation
,
math
,
number theory
1300
x8181
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12253
1208G
Polygons
greedy
,
math
,
number theory
2800
x778
1208A
XORinacci
math
900
x16887
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x6010
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21978
1206A
Choose Two Numbers
math
,
sortings
800
x24545
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x123
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14197
1204E
Natasha, Sasha and the Prefix Sums
combinatorics
,
dp
,
math
,
number theory
2300
x1696
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x3256
1204B
Mislove Has Lost an Array
greedy
,
math
900
x17568
1204A
BowWow and the Timetable
math
1000
x21013
1203C
Common Divisors
implementation
,
math
1300
x20870
1203B
Equal Rectangles
greedy
,
math
1200
x16041
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x415
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x5131
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2580
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x24219
1201B
Zero Array
greedy
,
math
1500
x19161
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1082
1200C
Round Corridor
math
,
number theory
1400
x9914
1199B
Water Lily
geometry
,
math
1000
x20709
1197D
Yet Another Subarray Problem
dp
,
greedy
,
math
1900
x5429
1197A
DIY Wooden Ladder
greedy
,
math
,
sortings
900
x13582
1196B
Odd Sum Segments
constructive algorithms
,
math
1200
x16696
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x27832
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x899
1195D2
Submarine in the Rybinsk Sea (hard edition)
combinatorics
,
math
,
number theory
1800
x4674
1195D1
Submarine in the Rybinsk Sea (easy edition)
combinatorics
,
math
,
number theory
1500
x7905
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19977
1195A
Drinks Choosing
greedy
,
math
1000
x13168
1194D
1-2-K Game
games
,
math
1700
x6602
1194A
Remove a Progression
math
800
x16376
1193A
Amusement Park
*special problem
,
dp
,
math
x278
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10624
1189B
Number Circle
greedy
,
math
,
sortings
1100
x14337
1188B
Count Pairs
math
,
matrices
,
number theory
,
two pointers
2300
x4589
1187F
Expected Square Beauty
dp
,
math
,
probabilities
2500
x888
1187A
Stickers and Toys
math
900
x14911
1186E
Vus the Cossack and a Field
divide and conquer
,
implementation
,
math
2500
x631
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8970
1186C
Vus the Cossack and Strings
implementation
,
math
1800
x6141
1185D
Extra Element
implementation
,
math
1700
x6747
1185C2
Exam in BerSU (hard version)
brute force
,
data structures
,
greedy
,
math
1700
x7482
1185A
Ropewalkers
math
800
x14933
1184D2
Parallel Universes (Hard)
math
,
matrices
3100
x107
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x139
1184A1
Heidi Learns Hashing (Easy)
brute force
,
math
,
number theory
1200
x5993
1183F
Topforces Strikes Back
brute force
,
math
,
sortings
2100
x2033
1183C
Computer Game
binary search
,
math
1400
x14062
1183B
Equalize Prices
math
900
x18568
1182E
Product Oriented Recurrence
dp
,
math
,
matrices
,
number theory
2300
x2860
1182A
Filling Shapes
dp
,
math
1000
x31454
1181A
Chunga-Changa
greedy
,
math
1000
x13700
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x25428
1179C
Serge and Dining Room
binary search
,
data structures
,
graph matchings
,
greedy
,
implementation
,
math
,
trees
2200
x2086
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7435
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x12043
1176B
Merge it!
math
1100
x17222
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1941
1175A
From Hero to Zero
implementation
,
math
900
x18332
1174E
Ehab and the Expected GCD Problem
combinatorics
,
dp
,
math
,
number theory
2500
x1557
1170A
Three Integers Again
*special problem
,
math
x1485
1169A
Circle Metro
implementation
,
math
900
x11992
1168E
Xor Permutations
constructive algorithms
,
math
3100
x379
1167F
Scalar Queries
combinatorics
,
data structures
,
math
,
sortings
2300
x1649
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x11879
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2847
1166D
Cute Sequences
binary search
,
brute force
,
greedy
,
math
2200
x2181
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x11508
1165E
Two Arrays and Sum of Functions
greedy
,
math
,
sortings
1600
x8417
1165D
Almost All Divisors
math
,
number theory
1600
x16301
1165A
Remainder
implementation
,
math
1100
x13844
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x687
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3681
1163A
Eating Soup
greedy
,
math
900
x13039
1159B
Expansion coefficient of the array
implementation
,
math
1300
x7093
1159A
A pile of stones
implementation
,
math
800
x12722
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