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Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
44:07:18
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Difficulty:
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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
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Status
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Custom test
Problems
#
Name
1885A
Deterministic Scheduling for Extended Reality over 5G and Beyond
*special problem
1639K
Treasure Hunt
graphs
,
interactive
1639J
Treasure Hunt
graphs
,
interactive
1639I
Treasure Hunt
graphs
,
interactive
1639H
Treasure Hunt
graphs
,
interactive
1639G
Treasure Hunt
graphs
,
interactive
1639F
Treasure Hunt
graphs
,
interactive
1639E
Treasure Hunt
graphs
,
interactive
1639D
Treasure Hunt
graphs
,
interactive
1639C
Treasure Hunt
graphs
,
interactive
1639B
Treasure Hunt
graphs
,
interactive
1639A
Treasure Hunt
graphs
,
interactive
1576A
Communication Routing Challenge
*special problem
1160A2
Collaboration
*special problem
92114
Labyrinth-14
3200
92113
Labyrinth-13
3200
92112
Labyrinth-12
3200
92111
Labyrinth-11
3200
92110
Labyrinth-10
3200
92109
Labyrinth-9
3200
92108
Labyrinth-8
3200
92107
Labyrinth-7
3200
92106
Labyrinth-6
3200
92105
Labyrinth-5
3200
92104
Labyrinth-4
3200
92103
Labyrinth-3
3200
92102
Labyrinth-2
3200
92101
Labyrinth-1
3200
775A
University Schedule
*special problem
2900
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
1302I
Deja vu
x2
1578C
Cactus Lady and her Cing
3500
x7
1302H
Who needs suffix structures?
x8
1302J
Keep talking and nobody explodes -- hard
x9
1939A
Draw Polygon Lines
*special problem
,
constructive algorithms
,
dp
,
geometry
,
interactive
x14
1302G
Keep talking and nobody explodes -- medium
x22
1599D
Bubble Popping
3200
x27
1297I
Falling Blocks
*special problem
,
data structures
x27
1773L
Lisa's Sequences
dp
3500
x28
1773C
Cactus Meets Torus
3500
x28
1252I
Mission Possible
3000
x29
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x30
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x31
1578G
Game of Chance
math
,
probabilities
3500
x31
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1488I
Demonic Invasion
*special problem
,
flows
3100
x33
1423D
Does anyone else hate the wind?
3100
x34
1211I
Unusual Graph
*special problem
,
graphs
3000
x34
1938A
Antiparticle Antiphysics
3500
x35
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x35
1170I
Good Subsets
*special problem
,
dp
x35
1571J
Two Railroads
*special problem
3000
x36
1425C
Captain of Knights
math
3100
x36
683I
Loader
*special problem
,
graphs
2500
x38
1910I
Inverse Problem
*special problem
,
combinatorics
,
dp
2700
x39
1184C3
Heidi and the Turing Test (Hard)
3200
x39
1297H
Paint the String
*special problem
,
dp
,
strings
x40
683J
The Hero with Bombs
*special problem
3000
x40
1910J
Two Colors
*special problem
2900
x41
1533J
Pawns
*special problem
x41
1431J
Zero-XOR Array
*special problem
,
dp
3400
x41
1431I
Cyclic Shifts
*special problem
,
strings
2900
x41
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x41
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1578D
Dragon Curve
3200
x43
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x43
1170H
Longest Saw
*special problem
,
constructive algorithms
x43
958A3
Death Stars (hard)
3100
x43
530I
Different variables
*special problem
2500
x43
345F
Superstitions Inspection
*special problem
2700
x43
345E
Black Cat Rush
*special problem
2700
x43
1938M
Zig-zag
3500
x44
1912C
Cactus Transformation
constructive algorithms
3300
x44
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x44
1302E
Amazing bitset
x44
690F3
Tree of Life (hard)
trees
3200
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
1357E2
Root of quantum Fourier transform
x47
1220G
Geolocation
geometry
3400
x47
1930I
Counting Is Fun
combinatorics
3500
x48
1910G
Pool Records
*special problem
,
greedy
2700
x49
661G
Hungarian Notation
*special problem
2200
x50
1938I
Symmetric Boundary
2800
x51
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x51
345G
Suffix Subgroup
*special problem
,
strings
2200
x51
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x52
1666B
Budget Distribution
3300
x52
1488H
Build From Suffixes
*special problem
,
combinatorics
,
data structures
2800
x52
863G
Graphic Settings
3200
x52
1912I
Innovative Washing Machine
geometry
,
math
,
two pointers
3300
x53
1116B2
Not A, not B or not C?
x53
1571I
Physical Examination
*special problem
,
binary search
,
data structures
3200
x54
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x55
162G
Non-decimal sum
*special problem
2000
x55
1909H
Parallel Swaps Sort
constructive algorithms
,
data structures
3500
x56
1510F
Fiber Shape
2800
x56
1275E3
Контрольная сумма
*special problem
x56
949F
Astronomy
geometry
,
probabilities
3300
x56
1192A
Building Skyscrapers
*special problem
x57
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