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2023 Post World Finals Online ICPC Challenge powered by Huawei
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Difficulty:
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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
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
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3173
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3170
1682D
Circular Spanning Tree
constructive algorithms
,
implementation
,
trees
2000
x3169
1558C
Bottom-Tier Reversals
constructive algorithms
,
greedy
2000
x3151
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3099
1256F
Equalizing Two Strings
constructive algorithms
,
sortings
,
strings
2000
x3052
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3040
1672F1
Array Shuffling
constructive algorithms
,
graphs
,
greedy
2000
x2965
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x2942
1941G
Rudolf and Subway
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2000
x2913
891B
Gluttony
constructive algorithms
,
greedy
2000
x2900
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2838
515D
Drazil and Tiles
constructive algorithms
,
greedy
2000
x2760
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2758
353D
Queue
constructive algorithms
,
dp
2000
x2722
963B
Destruction of a Tree
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2000
x2693
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2682
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2520
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2506
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2461
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2300
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2252
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2229
1129B
Wrong Answer
constructive algorithms
2000
x2150
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2049
1619F
Let's Play the Hat?
brute force
,
constructive algorithms
,
greedy
,
math
2000
x2009
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1950
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1895
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1720
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1718
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x1620
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1616
1080D
Olya and magical square
constructive algorithms
,
implementation
,
math
2000
x1519
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1096
128D
Numbers
constructive algorithms
,
implementation
2000
x1088
43D
Journey
brute force
,
constructive algorithms
,
implementation
2000
x1046
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x821
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x759
126C
E-reader Display
constructive algorithms
,
greedy
2000
x710
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x615
59D
Team Arrangement
constructive algorithms
,
greedy
,
implementation
2000
x601
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x556
44J
Triminoes
constructive algorithms
,
greedy
2000
x554
45E
Director
constructive algorithms
,
greedy
2000
x522
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x464
1571F
Kotlinforces
*special problem
,
constructive algorithms
,
dp
2000
x176
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6775
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x5304
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5123
1217D
Coloring Edges
constructive algorithms
,
dfs and similar
,
graphs
2100
x4940
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4610
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4305
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4282
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4192
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4014
1621D
The Winter Hike
constructive algorithms
,
greedy
,
math
2100
x3961
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3960
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3941
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x3903
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3830
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3632
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3587
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3565
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3416
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3284
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3236
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3235
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3225
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x3137
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3051
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3033
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x2930
1530E
Minimax
constructive algorithms
,
greedy
,
strings
2100
x2894
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2837
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2819
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x2781
1734E
Rectangular Congruence
constructive algorithms
,
number theory
2100
x2761
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2672
1748D
ConstructOR
bitmasks
,
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
math
,
number theory
2100
x2659
1551D2
Domino (hard version)
constructive algorithms
,
implementation
,
math
2100
x2653
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2580
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2576
128B
String
brute force
,
constructive algorithms
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2454
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x2424
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2291
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2279
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2269
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2253
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2241
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2175
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2133
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x1955
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1949
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1811
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1696
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1596
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1572
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1525
995A
Tesla
constructive algorithms
,
implementation
2100
x1501
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1465
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