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Codeforces Round 940 (Div. 2) and CodeCraft-23
38:58:30
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Difficulty:
—
implementation
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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Custom test
Problems
#
Name
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3131
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3114
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x2846
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x2838
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2679
1252H
Twin Buildings
greedy
,
implementation
1800
x2585
1267J
Just Arrange the Icons
greedy
,
implementation
,
math
1800
x2554
691C
Exponential notation
implementation
,
strings
1800
x2473
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2406
863C
1-2-3
graphs
,
implementation
1800
x2401
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2395
1177B
Digits Sequence (Hard Edition)
binary search
,
divide and conquer
,
implementation
1800
x2391
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2361
778B
Bitwise Formula
bitmasks
,
brute force
,
dfs and similar
,
expression parsing
,
implementation
1800
x2252
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2126
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2098
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2076
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2048
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x1928
328A
IQ Test
implementation
1800
x1927
49D
Game
brute force
,
dp
,
implementation
1800
x1830
65A
Harry Potter and Three Spells
implementation
,
math
1800
x1781
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1719
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1553
730A
Toda 2
greedy
,
implementation
1800
x1549
847K
Travel Cards
greedy
,
implementation
,
sortings
1800
x1482
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1475
62B
Tyndex.Brome
binary search
,
implementation
1800
x1262
251B
Playing with Permutations
implementation
,
math
1800
x1249
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1207
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1131
195C
Try and Catch
expression parsing
,
implementation
1800
x1111
87B
Vasya and Types
implementation
,
strings
1800
x1109
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1070
420B
Online Meeting
implementation
1800
x1007
200C
Football Championship
brute force
,
implementation
1800
x996
66C
Petya and File System
data structures
,
implementation
1800
x994
46D
Parking Lot
data structures
,
implementation
1800
x957
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x869
37B
Computer Game
greedy
,
implementation
1800
x850
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x737
120G
Boom
implementation
1800
x678
784C
INTERCALC
*special problem
,
implementation
1800
x670
180A
Defragmentation
implementation
1800
x522
1571C
Rhyme
*special problem
,
implementation
1800
x357
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x316
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x244
100F
Polynom
*special problem
,
implementation
1800
x132
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x109
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8467
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8347
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x7992
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7714
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6715
808D
Array Division
binary search
,
data structures
,
implementation
1900
x6709
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x5976
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x5908
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x5901
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5636
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5523
1707B
Difference Array
brute force
,
data structures
,
implementation
,
sortings
1900
x5510
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5218
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x5178
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5101
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5027
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4962
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4939
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4818
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4674
1208D
Restore Permutation
binary search
,
data structures
,
greedy
,
implementation
1900
x4647
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4397
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4317
1569D
Inconvenient Pairs
binary search
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x4231
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4186
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4133
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4124
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4045
319B
Psychos in a Line
data structures
,
implementation
1900
x4008
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x3990
1095E
Almost Regular Bracket Sequence
implementation
1900
x3984
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3970
1200D
White Lines
brute force
,
data structures
,
dp
,
implementation
,
two pointers
1900
x3875
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x3869
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3854
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3791
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3722
1029D
Concatenated Multiples
implementation
,
math
1900
x3691
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3670
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3661
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3605
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3572
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3553
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3427
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3402
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3384
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3378
959E
Mahmoud and Ehab and the xor-MST
bitmasks
,
dp
,
graphs
,
implementation
,
math
1900
x3297
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3255
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3244
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3236
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