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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
31:43:59
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Difficulty:
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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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Problems
#
Name
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x1993
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17032
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x26520
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x710
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5187
1781A
Parallel Projection
geometry
,
math
800
x14812
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x656
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1286
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16225
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x22862
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x589
1778E
The Tree Has Fallen!
bitmasks
,
dfs and similar
,
math
,
trees
2500
x783
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2494
1778B
The Forbidden Permutation
greedy
,
math
1300
x12791
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3144
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7538
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x16468
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x20539
1776N
Count Permutations
math
3500
x57
1776L
Controllers
binary search
,
math
1500
x4964
1776K
Uniform Chemistry
dp
,
math
3200
x63
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1924
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x329
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x727
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5641
1775C
Interesting Sequence
bitmasks
,
math
1600
x9424
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x11389
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x21870
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x90
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x308
1773A
Amazing Trick
constructive algorithms
,
graph matchings
,
math
,
probabilities
1900
x1449
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1248
1772D
Absolute Sorting
constructive algorithms
,
math
1400
x14640
1772C
Different Differences
constructive algorithms
,
greedy
,
math
1000
x22460
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8810
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x21808
1770G
Koxia and Bracket
divide and conquer
,
fft
,
math
3400
x141
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x581
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1283
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8187
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x850
1769B1
Копирование файлов I
*special problem
,
brute force
,
implementation
,
math
1000
x1303
1769A
Узкая дорога
*special problem
,
math
800
x1886
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1759
1768B
Quick Sort
greedy
,
math
900
x21793
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27741
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x815
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9274
1766D
Lucky Chains
math
,
number theory
1600
x8180
1765M
Minimum LCM
math
,
number theory
1000
x12000
1765K
Torus Path
greedy
,
math
1500
x5285
1765J
Hero to Zero
graph matchings
,
math
2900
x179
1765E
Exchange
brute force
,
math
1000
x9413
1764D
Doremy's Pegging Game
combinatorics
,
dp
,
math
2000
x2586
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x14813
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1662
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1926
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13727
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15079
1762E
Tree Sum
combinatorics
,
math
,
trees
2600
x582
1762C
Binary Strings are Fun
combinatorics
,
math
1400
x8758
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18448
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x74
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x193
1761D
Carry Bit
combinatorics
,
math
2100
x2303
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x18903
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4137
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3643
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x16816
1759B
Lost Permutation
math
800
x21439
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x6753
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18400
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4107
1753B
Factorial Divisibility
math
,
number theory
1600
x11862
1750G
Doping
combinatorics
,
dp
,
math
3300
x218
1750F
Majority
combinatorics
,
dp
,
math
,
strings
2700
x821
1750D
Count GCD
combinatorics
,
math
,
number theory
1800
x5450
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x16668
1749D
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
1900
x5180
1748E
Yet Another Array Counting Problem
binary search
,
data structures
,
divide and conquer
,
dp
,
flows
,
math
,
trees
2300
x1677
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2626
1748A
The Ultimate Square
math
800
x23354
1747E
List Generation
combinatorics
,
dp
,
math
2900
x477
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12157
1744F
MEX vs MED
math
,
two pointers
2000
x2820
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x5146
1744E1
Divisible Numbers (easy version)
brute force
,
math
,
number theory
1500
x9997
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x19891
1744B
Even-Odd Increments
implementation
,
math
800
x22602
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x237
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x25845
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9565
1742E
Scuza
binary search
,
greedy
,
math
1200
x21178
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2185
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17024
1741B
Funny Permutation
constructive algorithms
,
math
800
x24596
1740F
Conditional Mix
combinatorics
,
dp
,
math
2600
x739
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21135
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x365
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1442
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