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Custom test
Problems
#
Name
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6982
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x688
433D
Nanami's Digital Board
dsu
,
implementation
2000
x1036
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1270
187C
Weak Memory
dfs and similar
,
dsu
2000
x1299
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1753
1619G
Unusual Minesweeper
binary search
,
dfs and similar
,
dsu
,
greedy
,
sortings
2000
x2274
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2741
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2802
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x2874
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2943
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x3172
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3218
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3270
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3552
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3670
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3679
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x3955
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4099
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4842
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x5060
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x5778
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6248
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9149
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2247
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2315
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2351
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2920
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3006
566D
Restructuring Company
data structures
,
dsu
1900
x3100
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x3121
437D
The Child and Zoo
dsu
,
sortings
1900
x3136
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3194
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3272
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3331
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3607
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x3657
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3737
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3830
817D
Imbalanced Array
data structures
,
divide and conquer
,
dsu
,
sortings
1900
x4415
1276B
Two Fairs
combinatorics
,
dfs and similar
,
dsu
,
graphs
1900
x4674
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5037
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5129
1922D
Berserk Monsters
brute force
,
data structures
,
dsu
,
implementation
,
math
1900
x5248
1624G
MinOr Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x5566
1095F
Make It Connected
dsu
,
graphs
,
greedy
1900
x5872
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6926
1242B
0-1 MST
dfs and similar
,
dsu
,
graphs
,
sortings
1900
x6986
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7800
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8247
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x10415
1402A
Fancy Fence
*special problem
,
data structures
,
dsu
,
implementation
,
math
,
sortings
1800
x1143
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2535
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2581
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x3898
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x3921
1442B
Identify the Operations
combinatorics
,
data structures
,
dsu
,
greedy
,
implementation
1800
x4314
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4962
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5344
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x5826
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6571
1213G
Path Queries
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
1800
x6640
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7344
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2443
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3155
691D
Swaps in Permutation
dfs and similar
,
dsu
,
math
1700
x5308
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5617
1131F
Asya And Kittens
constructive algorithms
,
dsu
1700
x6403
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6624
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7115
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7532
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x7553
1411C
Peaceful Rooks
dfs and similar
,
dsu
,
graphs
1700
x7775
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8401
1209D
Cow and Snacks
dfs and similar
,
dsu
,
graphs
1700
x8835
1253D
Harmonious Graph
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
1700
x8852
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10242
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10472
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x16199
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4422
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5141
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6795
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6823
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x6996
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7144
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7330
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8716
722C
Destroying Array
data structures
,
dsu
1600
x8868
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10140
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10379
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12408
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2445
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2455
1575J
Jeopardy of Dropped Balls
binary search
,
brute force
,
dsu
,
implementation
1500
x3651
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4486
875B
Sorting the Coins
dsu
,
implementation
,
sortings
,
two pointers
1500
x5148
490B
Queue
dsu
,
implementation
1500
x5901
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8536
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8692
1675E
Replace With the Previous, Minimize
dsu
,
greedy
,
strings
1500
x10136
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combine-tags-by-or
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2-sat
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data structures
dfs and similar
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