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2023 Post World Finals Online ICPC Challenge powered by Huawei
11 days
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Codeforces Round 944 (Div. 4)
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constructive algorithms
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
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probabilities
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ternary search
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Problems
#
Name
27C
Unordered Subsequence
constructive algorithms
,
greedy
1900
x2692
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2790
622D
Optimal Number Permutation
constructive algorithms
1900
x2817
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2968
959D
Mahmoud and Ehab and another array construction task
constructive algorithms
,
greedy
,
math
,
number theory
1900
x3045
1714F
Build a Tree and That Is It
constructive algorithms
,
implementation
,
trees
1900
x3075
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x3114
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3196
1784B
Letter Exchange
constructive algorithms
1900
x3214
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3244
582B
Once Again...
constructive algorithms
,
dp
,
matrices
1900
x3303
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3324
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3403
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3501
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3605
1823D
Unique Palindromes
constructive algorithms
,
math
,
strings
1900
x3649
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x3652
1817B
Fish Graph
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
1900
x3861
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3876
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3919
862C
Mahmoud and Ehab and the xor
constructive algorithms
1900
x3939
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x4000
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4049
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4077
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4122
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4133
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4225
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4240
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4253
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4272
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4283
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4319
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4398
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4405
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x4488
1174D
Ehab and the Expected XOR Problem
bitmasks
,
constructive algorithms
1900
x4597
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4756
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4762
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4857
1213E
Two Small Strings
brute force
,
constructive algorithms
1900
x4915
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4915
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4950
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4971
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x4988
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5074
1647D
Madoka and the Best School in Russia
constructive algorithms
,
dp
,
math
,
number theory
1900
x5113
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5180
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5567
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5580
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5833
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5914
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x5928
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x6003
459C
Pashmak and Buses
combinatorics
,
constructive algorithms
,
math
1900
x6068
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6209
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x6605
1854A2
Dual (Hard Version)
constructive algorithms
,
math
1900
x6686
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6749
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7379
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7499
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7546
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7770
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8490
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x8733
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12672
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x320
45J
Planting Trees
constructive algorithms
1800
x887
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1072
238B
Boring Partition
constructive algorithms
1800
x1266
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1501
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1801
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1978
1090D
Similar Arrays
constructive algorithms
1800
x1986
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2136
145B
Lucky Number 2
constructive algorithms
1800
x2152
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2171
847C
Sum of Nestings
constructive algorithms
1800
x2330
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2368
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2376
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2406
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2504
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2565
899D
Shovel Sale
constructive algorithms
,
math
1800
x2683
610C
Harmony Analysis
constructive algorithms
1800
x2782
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x2841
1267L
Lexicography
constructive algorithms
,
strings
1800
x2847
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x2876
873D
Merge Sort
constructive algorithms
,
divide and conquer
1800
x2997
301A
Yaroslav and Sequence
constructive algorithms
1800
x3042
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x3084
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3207
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3252
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3298
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3435
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3544
1196E
Connected Component on a Chessboard
constructive algorithms
,
implementation
1800
x3632
989C
A Mist of Florescence
constructive algorithms
,
graphs
1800
x3709
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3759
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3807
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3835
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