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Before contest
Codeforces Round 941 (Div. 1)
29:46:02
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Before contest
Codeforces Round 941 (Div. 2)
29:46:02
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2-sat
binary search
bitmasks
brute force
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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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Problems
#
Name
1885A
Deterministic Scheduling for Extended Reality over 5G and Beyond
*special problem
1576A
Communication Routing Challenge
*special problem
1160A2
Collaboration
*special problem
775A
University Schedule
*special problem
2900
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
1939A
Draw Polygon Lines
*special problem
,
constructive algorithms
,
dp
,
geometry
,
interactive
x14
1297I
Falling Blocks
*special problem
,
data structures
x27
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x32
1488I
Demonic Invasion
*special problem
,
flows
3100
x33
1211I
Unusual Graph
*special problem
,
graphs
3000
x34
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x35
1170I
Good Subsets
*special problem
,
dp
x35
1571J
Two Railroads
*special problem
3000
x36
683I
Loader
*special problem
,
graphs
2500
x38
1910I
Inverse Problem
*special problem
,
combinatorics
,
dp
2700
x39
1297H
Paint the String
*special problem
,
dp
,
strings
x40
683J
The Hero with Bombs
*special problem
3000
x40
1533J
Pawns
*special problem
x41
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x41
1910J
Two Colors
*special problem
2900
x42
1431J
Zero-XOR Array
*special problem
,
dp
3400
x42
1431I
Cyclic Shifts
*special problem
,
strings
2900
x42
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x43
1170H
Longest Saw
*special problem
,
constructive algorithms
x43
530I
Different variables
*special problem
2500
x43
345F
Superstitions Inspection
*special problem
2700
x43
345E
Black Cat Rush
*special problem
2700
x43
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x44
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x45
1533I
Excursions
*special problem
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
x47
1910G
Pool Records
*special problem
,
greedy
2700
x49
661G
Hungarian Notation
*special problem
2200
x50
345G
Suffix Subgroup
*special problem
,
strings
2200
x51
1488H
Build From Suffixes
*special problem
,
combinatorics
,
data structures
2800
x52
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
162G
Non-decimal sum
*special problem
2000
x55
1275E3
Контрольная сумма
*special problem
x56
1192A
Building Skyscrapers
*special problem
x58
1939D
Big Persimmon
*special problem
,
dp
,
games
x59
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x60
661H
Rotate Matrix
*special problem
2400
x63
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x64
1297G
M-numbers
*special problem
,
dp
,
math
x65
1211G
King's Path
*special problem
,
math
,
trees
2500
x66
1170G
Graph Decomposition
*special problem
,
graphs
x68
1571G
A Battle Against a Dragon
*special problem
,
data structures
,
dp
2500
x71
162I
Truncatable primes
*special problem
2000
x71
153E
Euclidean Distance
*special problem
2100
x72
72D
Perse-script
*special problem
,
expression parsing
2300
x72
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x74
345D
Chain Letter
*special problem
,
dfs and similar
,
graphs
2200
x75
72B
INI-file
*special problem
,
implementation
2200
x75
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
153D
Date Change
*special problem
2000
x77
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x78
661E
Divisibility Check
*special problem
2000
x78
1533H
Submatrices
*special problem
,
bitmasks
,
data structures
,
dp
x80
64I
Sort the Table
*special problem
,
sortings
2400
x84
1533G
Biome Map
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
x86
162J
Brackets
*special problem
1800
x88
470G
Hamming Distance
*special problem
2300
x90
1275F
Шардирование постов
*special problem
,
binary search
,
interactive
x91
683H
Exchange of Books
*special problem
1900
x95
470F
Pairwise Sums
*special problem
2300
x96
530F
Jumping frogs
*special problem
2100
x97
774I
Composing Of String
*special problem
,
dp
2300
x100
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x102
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x104
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x109
64H
Table Bowling
*special problem
,
sortings
2300
x109
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x113
1769D3
Игра в Девятку III
*special problem
,
brute force
2300
x115
1170F
Wheels
*special problem
,
binary search
,
greedy
x115
409I
Feed the Golorp
*special problem
2400
x115
72F
Oil
*special problem
,
greedy
,
math
1900
x116
64G
Path Canonization
*special problem
2200
x116
1488G
Painting Numbers
*special problem
,
data structures
,
greedy
,
number theory
2500
x117
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x118
1211F
kotlinkotlinkotlinkotlin...
*special problem
,
graphs
,
implementation
,
strings
2300
x118
530H
Points in triangle
*special problem
,
geometry
2100
x119
345C
Counting Fridays
*special problem
2000
x121
345B
Triskaidekaphobia
*special problem
2100
x121
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x122
1356D2
Quantum Classification - 2
*special problem
x122
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x123
661D
Maximal Difference
*special problem
2100
x124
661C
Array Sum
*special problem
2000
x126
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x126
1812H
Expected Twist
*special problem
,
interactive
x130
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x130
1275E2
Контрольная сумма
*special problem
x130
683G
The Fraction
*special problem
1900
x130
1356D1
Quantum Classification - 1
*special problem
x132
100F
Polynom
*special problem
,
implementation
1800
x132
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
470D
Caesar Cipher
*special problem
1900
x145
683F
Reformat the String
*special problem
1800
x146
530G
Levenshtein distance
*special problem
2100
x146
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