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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
39:44:11
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Difficulty:
—
greedy
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
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x6903
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13140
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16224
1780A
Hayato and School
constructive algorithms
,
greedy
800
x20994
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1681
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7372
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11649
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22838
1778B
The Forbidden Permutation
greedy
,
math
1300
x12791
1778A
Flip Flop Sum
greedy
,
implementation
800
x23625
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x16466
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x20532
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x320
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x632
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3166
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x329
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x748
1776A
Walking Boy
greedy
800
x6701
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x727
1775E
The Human Equation
greedy
,
implementation
2100
x2985
1775A2
Gardener and the Capybaras (hard version)
constructive algorithms
,
greedy
900
x18171
1774E
Two Chess Pieces
dfs and similar
,
dp
,
greedy
,
trees
1900
x3283
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7304
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x11445
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x11387
1773E
Easy Assembly
greedy
,
sortings
1400
x4567
1773D
Dominoes
combinatorics
,
flows
,
graph matchings
,
greedy
2600
x408
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1247
1772C
Different Differences
constructive algorithms
,
greedy
,
math
1000
x22458
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x8808
1770A
Koxia and Whiteboards
brute force
,
greedy
1000
x22703
1769C1
Подкрутка I
*special problem
,
brute force
,
dp
,
greedy
1200
x921
1768F
Wonderful Jump
dp
,
greedy
2900
x754
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x6596
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13430
1768B
Quick Sort
greedy
,
math
900
x21793
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27739
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9273
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19484
1765N
Number Reduction
greedy
1500
x4347
1765K
Torus Path
greedy
,
math
1500
x5283
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1170
1765B
Broken Keyboard
greedy
800
x8685
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1159
1764C
Doremy's City Construction
graphs
,
greedy
1400
x8855
1764A
Doremy's Paint
greedy
800
x15822
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6189
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15078
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18447
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1700
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9059
1761B
Elimination of a Ring
constructive algorithms
,
greedy
,
implementation
1000
x12915
1760F
Quests
binary search
,
greedy
,
sortings
1500
x11034
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x18900
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x40911
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4135
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3643
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x16816
1758C
Almost All Multiples
greedy
,
number theory
1400
x12717
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18400
1754A
Technical Support
greedy
800
x22485
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x302
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x9645
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14133
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1326
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x15881
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13109
1749B
Death's Blessing
greedy
900
x20169
1749A
Cowardly Rooks
greedy
,
implementation
800
x21848
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10261
1747A
Two Groups
constructive algorithms
,
greedy
800
x24233
1746D
Paths on the Tree
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1900
x4361
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12157
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x16553
1746A
Maxmina
constructive algorithms
,
greedy
800
x19281
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x19888
1744A
Number Replacement
greedy
,
implementation
800
x26129
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7184
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x18461
1743B
Permutation Value
constructive algorithms
,
greedy
800
x21788
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9565
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x10569
1742E
Scuza
binary search
,
greedy
,
math
1200
x21173
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21016
1742B
Increasing
greedy
,
implementation
,
sortings
800
x43364
1741C
Minimize the Thickness
brute force
,
greedy
,
math
,
two pointers
1100
x17023
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4052
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10427
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13450
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4785
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21134
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x365
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1135
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10343
1738B
Prefix Sum Addicts
constructive algorithms
,
greedy
,
math
,
sortings
1200
x14574
1738A
Glory Addicts
greedy
,
implementation
,
sortings
800
x13267
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1798
1737A
Ela Sorting Books
greedy
,
implementation
,
strings
900
x9880
1736E
Swap and Take
dp
,
greedy
2600
x624
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2363
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