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EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)
32:18:38
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combine-tags-by-or
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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
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x305
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1395
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3126
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13789
1838B
Minimize Permutation Subarrays
constructive algorithms
,
math
1100
x16041
1838A
Blackboard List
constructive algorithms
,
math
800
x21232
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2104
1837E
Playoff Fixing
combinatorics
,
trees
2200
x2124
1837D
Bracket Coloring
constructive algorithms
,
greedy
1400
x13888
1837C
Best Binary String
constructive algorithms
,
greedy
1000
x21422
1837B
Comparison String
greedy
900
x27545
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x30251
1836B
Astrophysicists
greedy
,
math
1100
x12409
1836A
Destroyer
implementation
,
sortings
800
x20007
1835F
Good Graph
bitmasks
,
dfs and similar
,
graph matchings
,
graphs
,
implementation
3500
x157
1835E
Old Mobile
combinatorics
,
dp
,
probabilities
3500
x217
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x458
1835C
Twin Clusters
bitmasks
,
brute force
,
constructive algorithms
,
math
,
probabilities
2600
x949
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x918
1835A
k-th equality
brute force
,
implementation
,
math
1700
x7583
1834F
Typewriter
brute force
,
math
2500
x496
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x2111
1834D
Survey in Class
brute force
,
data structures
,
greedy
,
implementation
,
sortings
1900
x4461
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12878
1834B
Maximum Strength
greedy
,
math
1000
x14794
1834A
Unit Array
greedy
,
math
800
x22420
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x5052
1833F
Ira and Flamenco
combinatorics
,
constructive algorithms
,
data structures
,
implementation
,
math
,
sortings
,
two pointers
1700
x6935
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10916
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x12938
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x25741
1833B
Restore the Weather
greedy
,
sortings
900
x25761
1833A
Musical Puzzle
implementation
,
strings
800
x31965
1832F
Zombies
binary search
,
dp
3200
x259
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2088
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1824
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2837
1832C
Contrast Value
greedy
,
implementation
1200
x19060
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x20391
1832A
New Palindrome
strings
800
x25128
1831B
Array merging
constructive algorithms
,
greedy
1000
x19297
1831A
Twin Permutations
constructive algorithms
800
x25080
1830F
The Third Grace
data structures
,
dp
3200
x237
1830E
Bully Sort
data structures
,
math
3500
x234
1830D
Mex Tree
brute force
,
dp
,
trees
2800
x617
1830C
Hyperregular Bracket Strings
combinatorics
,
greedy
,
hashing
,
math
,
number theory
,
sortings
2400
x1567
1830B
The BOSS Can Count Pairs
brute force
,
math
2000
x4693
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12810
1829H
Don't Blame Me
bitmasks
,
combinatorics
,
dp
,
math
1700
x7320
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9741
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16568
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18893
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24973
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27656
1829B
Blank Space
implementation
800
x42436
1829A
Love Story
implementation
,
strings
800
x47716
1828B
Permutation Swap
math
,
number theory
900
x21476
1828A
Divisible Array
constructive algorithms
,
math
800
x23225
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x111
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x370
1827D
Two Centroids
data structures
,
dfs and similar
,
greedy
,
trees
2800
x716
1827C
Palindrome Partition
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
strings
2600
x1160
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1795
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3731
1827A
Counting Orders
combinatorics
,
math
,
sortings
,
two pointers
1100
x17984
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x343
1826E
Walk the Runway
bitmasks
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
2400
x1529
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8943
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x13046
1826B
Lunatic Never Content
math
,
number theory
1100
x16398
1826A
Trust Nobody
brute force
,
greedy
,
implementation
,
sortings
1200
x14734
1825B
LuoTianyi and the Table
greedy
,
math
1000
x14347
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19407
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x127
1824D
LuoTianyi and the Function
data structures
3000
x468
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1275
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2523
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4399
1824A
LuoTianyi and the Show
greedy
,
implementation
1400
x10985
1823F
Random Walk
dp
,
graphs
,
math
,
probabilities
,
trees
2600
x813
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1206
1823D
Unique Palindromes
constructive algorithms
,
math
,
strings
1900
x3721
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11869
1823B
Sort with Step
brute force
,
math
,
sortings
900
x15606
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x15916
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2355
1822G1
Magic Triples (Easy Version)
brute force
,
data structures
,
math
,
number theory
1700
x6693
1822F
Gardening Friends
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x5744
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x9976
1822D
Super-Permutation
constructive algorithms
,
math
1200
x16156
1822C
Bun Lover
math
800
x22523
1822B
Karina and Array
greedy
,
math
,
sortings
800
x24300
1822A
TubeTube Feed
brute force
,
implementation
800
x23855
1821F
Timber
combinatorics
,
dp
,
fft
,
math
2600
x723
1821E
Rearrange Brackets
brute force
,
dp
,
greedy
,
sortings
,
strings
2100
x2293
1821D
Black Cells
binary search
,
brute force
,
greedy
,
math
1900
x4831
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13827
1821B
Sort the Subarray
brute force
,
greedy
1100
x17500
1821A
Matching
combinatorics
,
math
800
x19530
1820B
JoJo's Incredible Adventures
math
,
strings
,
two pointers
1100
x13811
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