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Problems
#
Name
1106A
Lunar New Year and Cross Counting
implementation
800
x12276
1105E
Helping Hiasat
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2200
x1589
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3976
1105C
Ayoub and Lost Array
combinatorics
,
dp
,
math
1500
x10125
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9792
1105A
Salem and Sticks
brute force
,
implementation
1100
x10773
1104B
Game with string
data structures
,
implementation
,
math
1200
x14454
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x15160
1103E
Radix sum
fft
,
math
,
number theory
3400
x216
1103D
Professional layer
bitmasks
,
dp
3100
x399
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x777
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3170
1103A
Grid game
constructive algorithms
,
implementation
1400
x9580
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1902
1102E
Monotonic Renumeration
combinatorics
,
sortings
1700
x5601
1102D
Balanced Ternary String
greedy
,
strings
1500
x7820
1102C
Doors Breaking and Repairing
games
1200
x12781
1102B
Array K-Coloring
greedy
,
sortings
1400
x10164
1102A
Integer Sequence Dividing
math
800
x23411
1101G
(Zero XOR Subset)-less
math
,
matrices
2300
x1604
1101F
Trucks and Cities
binary search
,
dp
2400
x1257
1101E
Polycarp's New Job
implementation
1500
x7708
1101D
GCD Counting
data structures
,
dfs and similar
,
dp
,
number theory
,
trees
2000
x4399
1101C
Division and Union
sortings
1500
x7566
1101B
Accordion
greedy
,
implementation
1300
x10362
1101A
Minimum Integer
math
1000
x16700
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2114
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2287
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x831
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x9721
1100B
Build a Contest
data structures
,
implementation
1300
x10886
1100A
Roman and Browser
implementation
1000
x10029
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
1099C
Postcard
constructive algorithms
,
implementation
1200
x9397
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x10979
1099A
Snowball
implementation
800
x12751
1098F
Ж-function
string suffix structures
,
strings
3500
x217
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x212
1098D
Eels
data structures
2800
x704
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x865
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1465
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8353
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x93
1097G
Vladislav and a Great Legend
combinatorics
,
dp
,
trees
3000
x661
1097F
Alex and a TV Show
bitmasks
,
combinatorics
,
number theory
2500
x1213
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x458
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2559
1097C
Yuhao and a Parenthesis
greedy
,
implementation
1400
x8327
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x26554
1097A
Gennady and a Card Game
brute force
,
implementation
800
x36991
1096G
Lucky Tickets
divide and conquer
,
dp
,
fft
2400
x1372
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1564
1096E
The Top Scorer
combinatorics
,
dp
,
math
,
probabilities
2500
x860
1096D
Easy Problem
dp
1800
x7685
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6667
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10332
1096A
Find Divisible
greedy
,
implementation
,
math
800
x18371
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x5841
1095E
Almost Regular Bracket Sequence
implementation
1900
x4002
1095D
Circular Dance
implementation
1600
x7334
1095C
Powers Of Two
bitmasks
,
greedy
1400
x15721
1095B
Array Stabilization
implementation
900
x21176
1095A
Repeating Cipher
implementation
800
x29416
1093G
Multidimensional Queries
bitmasks
,
data structures
2300
x1823
1093F
Vasya and Array
dp
2400
x970
1093E
Intersection of Permutations
data structures
2400
x1483
1093D
Beautiful Graph
dfs and similar
,
graphs
1700
x8469
1093C
Mishka and the Last Exam
greedy
1300
x9276
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x16102
1093A
Dice Rolling
math
800
x17553
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x7163
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x1620
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2830
1092D1
Great Vova Wall (Version 1)
greedy
,
implementation
,
math
2200
x4448
1092C
Prefixes and Suffixes
strings
1700
x5773
1092B
Teams Forming
sortings
800
x25630
1092A
Uniform String
implementation
800
x15952
1091H
New Year and the Tricolore Recreation
games
3200
x417
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x193
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x785
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x976
1091D
New Year and the Permutation Concatenation
combinatorics
,
dp
,
math
1700
x6593
1091C
New Year and the Sphere Transmission
math
,
number theory
1400
x9783
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x10498
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17327
1090M
The Pleasant Walk
implementation
1000
x6012
1090L
Berland University
greedy
,
math
2000
x1247
1090K
Right Expansion Of The Mind
math
2000
x1048
1090J
Two Prefixes
strings
2600
x413
1090I
Minimal Product
2000
x1024
1090H
Linearization
graphs
2900
x88
1090G
Combostone
games
,
implementation
2500
x103
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x299
1090E
Horseback Riding
flows
,
graphs
2300
x573
1090D
Similar Arrays
constructive algorithms
1800
x1985
1090C
New Year Presents
constructive algorithms
,
data structures
2400
x478
1090B
LaTeX Expert
1900
x1373
1090A
Company Merging
greedy
1300
x4034
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x585
1089L
Lazyland
900
x3822
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binary search
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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
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shortest paths
sortings
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strings
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