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2023 Post World Finals Online ICPC Challenge powered by Huawei
13:36:52
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Difficulty:
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dfs and similar
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
1056D
Decorate Apple Tree
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
1600
x5620
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5648
813C
The Tag Game
dfs and similar
,
graphs
1700
x5654
1399E1
Weights Division (easy version)
data structures
,
dfs and similar
,
greedy
,
trees
2000
x5676
1118F1
Tree Cutting (Easy Version)
dfs and similar
,
trees
1800
x5676
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5749
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x5751
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x5773
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x5791
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x5795
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5801
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5801
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5833
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5843
1272E
Nearest Opposite Parity
dfs and similar
,
graphs
,
shortest paths
1900
x5849
1807F
Bouncy Ball
brute force
,
dfs and similar
,
implementation
1700
x5862
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5907
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x5910
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5966
118E
Bertown roads
dfs and similar
,
graphs
2000
x5975
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6024
1805D
A Wide, Wide Graph
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1800
x6034
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6074
979C
Kuro and Walking Route
dfs and similar
,
trees
1600
x6078
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6078
216B
Forming Teams
dfs and similar
,
implementation
1700
x6087
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6095
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6102
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x6106
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6122
1156B
Ugly Pairs
dfs and similar
,
greedy
,
implementation
,
sortings
,
strings
1800
x6127
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6188
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6189
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6196
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6241
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6254
1721D
Maximum AND
bitmasks
,
dfs and similar
,
divide and conquer
,
greedy
,
sortings
1800
x6289
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6301
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6348
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6413
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6480
1722F
L-shapes
dfs and similar
,
implementation
1700
x6523
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6544
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6548
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6662
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x6682
1552D
Array Differentiation
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
math
1800
x6683
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x6722
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6722
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x6760
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6778
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6786
1385E
Directing Edges
constructive algorithms
,
dfs and similar
,
graphs
2000
x6799
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6808
1760G
SlavicG's Favorite Problem
bitmasks
,
dfs and similar
,
graphs
1700
x6870
1931F
Chat Screenshots
combinatorics
,
dfs and similar
,
graphs
1700
x6898
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6934
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6936
1242B
0-1 MST
dfs and similar
,
dsu
,
graphs
,
sortings
1900
x6969
1027D
Mouse Hunt
dfs and similar
,
graphs
1700
x6992
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7000
540C
Ice Cave
dfs and similar
2000
x7008
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7079
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7081
1714G
Path Prefixes
binary search
,
data structures
,
dfs and similar
,
trees
1700
x7100
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7103
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7124
1092F
Tree with Maximum Cost
dfs and similar
,
dp
,
trees
1900
x7164
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7302
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7332
1187E
Tree Painting
dfs and similar
,
dp
,
trees
2100
x7439
1535D
Playoff Tournament
data structures
,
dfs and similar
,
dp
,
implementation
,
trees
1800
x7481
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7485
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x7602
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7603
1411C
Peaceful Rooks
dfs and similar
,
dsu
,
graphs
1700
x7764
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7788
744A
Hongcow Builds A Nation
dfs and similar
,
graphs
1500
x7894
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8032
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8050
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8055
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8127
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8228
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8314
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x8353
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8382
1093D
Beautiful Graph
dfs and similar
,
graphs
1700
x8472
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8520
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8578
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8692
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x8801
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8801
1209D
Cow and Snacks
dfs and similar
,
dsu
,
graphs
1700
x8804
1253D
Harmonious Graph
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
1700
x8835
780C
Andryusha and Colored Balloons
dfs and similar
,
graphs
,
greedy
,
trees
1600
x8850
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x8856
920C
Swap Adjacent Elements
dfs and similar
,
greedy
,
math
,
sortings
,
two pointers
1400
x8995
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9057
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9157
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9193
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