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2023 Post World Finals Online ICPC Challenge powered by Huawei
01:55:01
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Difficulty:
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brute force
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
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2838
1814F
Communication Towers
brute force
,
divide and conquer
,
dsu
2700
x462
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x817
1814B
Long Legs
brute force
,
math
1700
x9512
1812B
Was it Rated?
*special problem
,
*special problem
,
*special problem
,
brute force
,
implementation
x5569
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2965
1810C
Make It Permutation
brute force
,
greedy
,
sortings
1300
x13772
1810A
Beautiful Sequence
brute force
,
greedy
800
x20335
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x418
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2162
1808C
Unlucky Numbers
brute force
,
dp
,
greedy
,
implementation
1900
x3578
1808A
Lucky Numbers
brute force
,
implementation
900
x17306
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17814
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5863
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2682
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7194
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x812
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1522
1805A
We Need the Zero
bitmasks
,
brute force
800
x20989
1804E
Routing
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
2400
x1357
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4415
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11500
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x12026
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12134
1799F
Halve or Subtract
binary search
,
brute force
,
dp
,
greedy
,
sortings
2700
x767
1799B
Equalize by Divide
brute force
,
constructive algorithms
,
greedy
,
math
1200
x10805
1798E
Multitest Generator
brute force
,
dp
2300
x1501
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15873
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1188
1797D
Li Hua and Tree
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1900
x3695
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x168
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18559
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21148
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23228
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1274
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x373
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1303
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13192
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x11472
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26864
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3149
1790C
Premutation
brute force
,
implementation
,
math
1000
x22928
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x515
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x760
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1570
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15766
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16941
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3726
1788A
One and Two
brute force
,
implementation
,
math
800
x27524
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x395
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8612
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x301
1784A
Monsters (easy version)
brute force
,
greedy
1000
x14470
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2021
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4173
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1264
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5232
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7033
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13219
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1368
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1302
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16534
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x131
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x7645
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19307
1774G
Segment Covering
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
trees
3200
x366
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x640
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1019
1774D
Same Count One
brute force
,
constructive algorithms
,
greedy
,
implementation
,
two pointers
1600
x7412
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x453
1772B
Matrix Rotation
brute force
,
implementation
800
x28165
1771E
Hossam and a Letter
brute force
,
dp
,
implementation
,
two pointers
2500
x657
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2595
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8258
1770A
Koxia and Whiteboards
brute force
,
greedy
1000
x22858
1769D3
Игра в Девятку III
*special problem
,
brute force
2300
x115
1769D2
Игра в Девятку II
*special problem
,
brute force
2200
x186
1769D1
Игра в Девятку I
*special problem
,
brute force
,
dp
1800
x367
1769C1
Подкрутка I
*special problem
,
brute force
,
dp
,
greedy
1200
x928
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x854
1769B1
Копирование файлов I
*special problem
,
brute force
,
implementation
,
math
1000
x1310
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x832
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1125
1766A
Extremely Round
brute force
,
implementation
800
x23885
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x561
1765E
Exchange
brute force
,
math
1000
x9515
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x884
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6275
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13880
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1728
1761A
Two Permutations
brute force
,
constructive algorithms
800
x16871
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x9932
1759D
Make It Round
brute force
,
number theory
1400
x12147
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x6858
1753F
Minecraft Series
brute force
,
two pointers
3500
x185
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x308
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x15944
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10427
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14207
1744E2
Divisible Numbers (hard version)
brute force
,
math
,
number theory
1900
x5262
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