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Custom test
Problems
#
Name
1671A
String Building
implementation
800
x20177
1670F
Jee, You See?
bitmasks
,
combinatorics
,
dp
2400
x919
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1674
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4959
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9528
1670B
Dorms War
brute force
,
implementation
,
strings
1100
x12423
1670A
Prof. Slim
greedy
,
implementation
,
sortings
800
x15244
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x16483
1669G
Fall Down
dfs and similar
,
implementation
1200
x17397
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x23215
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16955
1669D
Colorful Stamp
implementation
1100
x21147
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32999
1669B
Triple
implementation
,
sortings
800
x40096
1669A
Division?
implementation
800
x57478
1668B
Social Distance
greedy
,
math
,
sortings
900
x16338
1668A
Direction Change
implementation
,
math
800
x16164
1667F
Yin Yang
implementation
3500
x91
1667E
Centroid Probabilities
combinatorics
,
dp
,
fft
,
math
3000
x625
1667D
Edge Elimination
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x642
1667C
Half Queen Cover
constructive algorithms
,
math
2400
x1518
1667B
Optimal Partition
data structures
,
dp
2100
x3481
1667A
Make it Increasing
brute force
,
greedy
,
math
1300
x14372
1666L
Labyrinth
dfs and similar
,
graphs
1800
x2985
1666K
Kingdom Partition
flows
3200
x185
1666J
Job Lookup
constructive algorithms
,
dp
,
shortest paths
,
trees
2100
x1294
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1384
1666H
Heroes of Might
math
3500
x60
1666G
Global Warming
geometry
,
math
3100
x133
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x1111
1666E
Even Split
binary search
,
constructive algorithms
,
greedy
,
math
2500
x681
1666D
Deletive Editing
greedy
900
x6931
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x3087
1666B
Budget Distribution
3300
x53
1666A
Admissible Map
3300
x99
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1426
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x3713
1665C
Tree Infection
binary search
,
greedy
,
sortings
,
trees
1600
x8060
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x18800
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23004
1663H
Cross-Language Program
*special problem
,
constructive algorithms
x1264
1663G
Six Characters
*special problem
,
constructive algorithms
,
strings
x204
1663F
In Every Generation...
*special problem
,
strings
x328
1663E
Are You Safe?
*special problem
,
implementation
x541
1663D
Is it rated - 3
*special problem
,
combinatorics
,
dp
,
math
x1387
1663C
Pōja Verdon
*special problem
,
implementation
,
math
x5618
1663B
Mike's Sequence
*special problem
,
divide and conquer
,
implementation
,
math
x3357
1663A
Who Tested?
*special problem
,
expression parsing
,
trees
x10404
1662O
Circular Maze
brute force
,
dfs and similar
,
graphs
,
implementation
x1271
1662N
Drone Photo
combinatorics
,
math
,
sortings
x694
1662M
Bottle Arrangements
constructive algorithms
x3292
1662L
Il Derby della Madonnina
data structures
,
dp
,
math
x994
1662K
Pandemic Restrictions
geometry
,
ternary search
x304
1662J
Training Camp
flows
,
graphs
x200
1662I
Ice Cream Shop
brute force
,
implementation
,
sortings
x1973
1662H
Boundary
brute force
,
math
x2803
1662G
Gastronomic Event
dp
,
greedy
,
trees
x445
1662F
Antennas
data structures
,
dfs and similar
,
graphs
,
graphs
,
implementation
,
implementation
,
shortest paths
,
shortest paths
x966
1662E
Round Table
math
x127
1662D
Evolution of Weasels
greedy
,
implementation
,
strings
x1689
1662C
European Trip
dp
,
graphs
,
math
,
matrices
x289
1662B
Toys
greedy
,
strings
x131
1662A
Organizing SWERC
brute force
,
implementation
x4180
1661F
Teleporters
binary search
,
greedy
2600
x553
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x911
1661D
Progressions Covering
data structures
,
greedy
1900
x4531
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x8981
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x17022
1661A
Array Balancing
greedy
,
math
800
x18204
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x2605
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x7011
1660E
Matrix and Shifts
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x6989
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8181
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18806
1660B
Vlad and Candies
math
800
x27557
1660A
Vasya and Coins
greedy
,
math
800
x35107
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x182
1659E
AND-MEX Walk
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2200
x1468
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3882
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9730
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10639
1659A
Red Versus Blue
constructive algorithms
,
greedy
,
implementation
,
math
1000
x17036
1658F
Juju and Binary String
brute force
,
constructive algorithms
,
greedy
,
math
2700
x725
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1022
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x2442
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x8775
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x9099
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x18375
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20138
1657F
Words on Tree
2-sat
,
dfs and similar
,
dsu
,
graphs
,
trees
2600
x552
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1993
1657D
For Gamers. By Gamers.
binary search
,
brute force
,
greedy
,
math
,
sortings
2000
x4716
1657C
Bracket Sequence Deletion
greedy
,
implementation
1200
x16533
1657B
XY Sequence
greedy
800
x22591
1657A
Integer Moves
brute force
,
math
800
x23698
1656I
Neighbour Ordering
constructive algorithms
,
graphs
3500
x97
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x416
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x271
1656F
Parametric MST
binary search
,
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
2600
x988
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x3305
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binary search
bitmasks
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dfs and similar
divide and conquer
dp
dsu
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fft
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geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
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