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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
33:07:57
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Difficulty:
—
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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Custom test
Problems
#
Name
1578G
Game of Chance
math
,
probabilities
3500
x31
1488J
Flower Shop
*special problem
,
data structures
,
fft
,
math
3100
x31
1425C
Captain of Knights
math
3100
x36
1949H
Division Avoidance
greedy
,
math
x41
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x42
1912I
Innovative Washing Machine
geometry
,
math
,
two pointers
3300
x49
1949E
Damage per Second
brute force
,
math
x50
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x54
1776N
Count Permutations
math
3500
x57
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x58
1666H
Heroes of Might
math
3500
x59
1776K
Uniform Chemistry
dp
,
math
3200
x63
1297G
M-numbers
*special problem
,
dp
,
math
x64
1211G
King's Path
*special problem
,
math
,
trees
2500
x65
1310F
Bad Cryptography
math
,
number theory
3400
x66
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x66
1909I
Short Permutation Problem
combinatorics
,
dp
,
fft
,
math
1900
x67
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x68
737F
Dirty plates
constructive algorithms
,
math
3300
x68
1704H2
Game of AI (hard version)
combinatorics
,
fft
,
math
3500
x70
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x73
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x74
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x74
1687F
Koishi's Unconscious Permutation
fft
,
math
3500
x75
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x75
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x78
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x78
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x79
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x80
901E
Cyclic Cipher
fft
,
math
3300
x83
28E
DravDe saves the world
geometry
,
math
2800
x83
1677F
Tokitsukaze and Gems
dp
,
math
3500
x85
756F
Long number
expression parsing
,
math
,
number theory
3400
x88
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x90
1045F
Shady Lady
geometry
,
math
3400
x90
1704G
Mio and Lucky Array
constructive algorithms
,
fft
,
math
,
strings
3500
x94
128E
Birthday
geometry
,
math
2900
x95
1540E
Tasty Dishes
math
,
matrices
3500
x96
1266H
Red-Blue Graph
dp
,
graphs
,
math
,
matrices
,
meet-in-the-middle
3400
x96
109E
Lucky Interval
brute force
,
math
2700
x96
1912F
Fugitive Frenzy
math
,
probabilities
3100
x97
1381E
Origami
geometry
,
math
,
sortings
3300
x98
1718E
Impressionism
constructive algorithms
,
graphs
,
implementation
,
math
3500
x101
1575F
Finding Expected Value
math
2900
x101
1184D2
Parallel Universes (Hard)
math
,
matrices
3100
x101
1566H
Xor-quiz
constructive algorithms
,
dp
,
interactive
,
math
,
number theory
3200
x104
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x106
269E
String Theory
geometry
,
math
,
strings
3100
x106
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x111
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x114
72F
Oil
*special problem
,
greedy
,
math
1900
x114
1725D
Deducing Sortability
binary search
,
bitmasks
,
math
2900
x115
1477F
Nezzar and Chocolate Bars
combinatorics
,
fft
,
math
,
probabilities
3500
x115
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x116
868G
El Toll Caves
math
3300
x117
446E
DZY Loves Bridges
math
,
matrices
3100
x117
79E
Security System
math
2900
x117
1949K
Make Triangle
constructive algorithms
,
math
x118
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x119
802F
Marmots (hard)
math
,
probabilities
2800
x119
40D
Interesting Sequence
math
2600
x119
1552I
Organizing a Music Festival
dfs and similar
,
math
3400
x120
913H
Don't Exceed
math
,
probabilities
3400
x121
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x122
1662E
Round Table
math
x122
1586I
Omkar and Mosaic
combinatorics
,
constructive algorithms
,
math
3500
x122
1810H
Last Number
combinatorics
,
math
2900
x127
1580F
Problems for Codeforces
combinatorics
,
fft
,
math
3300
x128
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x129
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x129
1184A3
Heidi Learns Hashing (Hard)
fft
,
math
,
number theory
3100
x130
1666G
Global Warming
geometry
,
math
3100
x131
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x132
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x135
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x140
1770G
Koxia and Bracket
divide and conquer
,
fft
,
math
3400
x141
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x141
859G
Circle of Numbers
math
3000
x143
549E
Sasha Circle
geometry
,
math
2700
x144
396E
On Iteration of One Well-Known Function
math
x144
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x146
1299E
So Mean
interactive
,
math
3400
x147
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x149
267C
Berland Traffic
math
,
matrices
2700
x152
1450H2
Multithreading (Hard Version)
combinatorics
,
implementation
,
math
3300
x159
1054H
Epic Convolution
chinese remainder theorem
,
fft
,
math
,
number theory
3500
x161
329E
Evil
math
3100
x162
1408I
Bitwise Magic
dp
,
math
3200
x163
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x163
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x165
1704H1
Game of AI (easy version)
combinatorics
,
constructive algorithms
,
dp
,
fft
,
math
3200
x166
1601F
Two Sorts
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
3400
x166
401E
Olympic Games
math
2500
x166
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x172
1242D
Number Discovery
math
3400
x174
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x176
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x177
86E
Long sequence
brute force
,
math
,
matrices
2700
x177
1765J
Hero to Zero
graph matchings
,
math
2900
x179
72A
Goshtasp, Vishtasp and Eidi
*special problem
,
greedy
,
math
1800
x180
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