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Custom test
Problems
#
Name
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5392
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11481
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18293
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x27471
1915C
Can I Square?
binary search
,
implementation
800
x37243
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x38234
1915A
Odd One Out
bitmasks
,
implementation
800
x49242
1914G2
Light Bulbs (Hard Version)
combinatorics
,
data structures
,
dfs and similar
,
dp
,
graphs
,
hashing
2300
x1211
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1660
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3652
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11174
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11080
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x18010
1914C
Quests
greedy
,
math
1100
x20598
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x28452
1914A
Problemsolving Log
implementation
,
strings
800
x29540
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x286
1913E
Matrix Problem
flows
,
graphs
2400
x899
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x2685
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13567
1913B
Swap and Delete
strings
1000
x21532
1913A
Rating Increase
implementation
800
x22226
1912L
LOL Lovers
strings
800
x6267
1912K
Kim's Quest
bitmasks
,
combinatorics
,
dp
1800
x2005
1912J
Joy of Pokémon Observation
2300
x518
1912I
Innovative Washing Machine
geometry
,
math
,
two pointers
3300
x54
1912H
Hypercatapult Commute
graphs
2400
x370
1912G
Great City Saint Petersburg
data structures
2400
x415
1912F
Fugitive Frenzy
math
,
probabilities
3100
x104
1912E
Evaluate It and Back Again
constructive algorithms
,
implementation
,
math
2200
x768
1912D
Divisibility Test
math
1900
x1298
1912C
Cactus Transformation
constructive algorithms
3300
x45
1912B
Blueprint for Seating
combinatorics
,
divide and conquer
,
math
2100
x917
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1858
1910J
Two Colors
*special problem
2900
x42
1910I
Inverse Problem
*special problem
,
combinatorics
,
dp
2700
x39
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
1910G
Pool Records
*special problem
,
greedy
2700
x49
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x155
1910E
Maximum Sum Subarrays
*special problem
,
dp
2100
x167
1910D
Remove and Add
*special problem
,
greedy
1800
x296
1910C
Poisonous Swamp
*special problem
,
*special problem
,
implementation
,
implementation
1600
x568
1910B
Security Guard
*special problem
,
greedy
1600
x579
1910A
Username
*special problem
,
implementation
1100
x1542
1909I
Short Permutation Problem
combinatorics
,
dp
,
fft
,
math
1900
x73
1909H
Parallel Swaps Sort
constructive algorithms
,
data structures
3500
x59
1909G
Pumping Lemma
hashing
,
strings
3000
x318
1909F2
Small Permutation Problem (Hard Version)
combinatorics
,
dp
,
math
2500
x824
1909F1
Small Permutation Problem (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2200
x1627
1909E
Multiple Lamps
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2400
x1240
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3960
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9898
1909B
Make Almost Equal With Mod
bitmasks
,
constructive algorithms
,
math
,
number theory
1200
x13751
1909A
Distinct Buttons
implementation
,
math
800
x15678
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1733
1907F
Shift and Reverse
greedy
,
sortings
1800
x4353
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8724
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11876
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x18279
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x23076
1907A
Rook
implementation
800
x33841
1906M
Triangle Construction
greedy
,
math
1700
x2299
1906L
Palindromic Parentheses
constructive algorithms
2500
x431
1906K
Deck-Building Game
divide and conquer
,
math
2500
x263
1906J
Count BFS Graph
combinatorics
,
dp
2100
x624
1906I
Contingency Plan 2
graph matchings
2900
x125
1906H
Twin Friends
combinatorics
,
dp
2200
x601
1906G
Grid Game 2
games
,
number theory
2900
x145
1906F
Maximize The Value
data structures
,
sortings
2100
x925
1906E
Merge Not Sort
constructive algorithms
,
dp
1900
x1286
1906D
Spaceship Exploration
binary search
,
geometry
2800
x89
1906C
Cursed Game
interactive
3000
x161
1906B
Button Pressing
bitmasks
,
constructive algorithms
,
hashing
2600
x454
1906A
Easy As ABC
brute force
1000
x3503
1905F
Field Should Not Be Empty
brute force
,
data structures
,
divide and conquer
2600
x448
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x843
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3467
1905C
Largest Subsequence
greedy
,
strings
1400
x10987
1905B
Begginer's Zelda
greedy
,
trees
1100
x15200
1905A
Constructive Problems
constructive algorithms
,
math
800
x21730
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x307
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x805
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3772
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5627
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10506
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12738
1904A
Forked!
brute force
,
implementation
900
x15671
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x551
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1786
1903D2
Maximum And Queries (hard version)
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x703
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5031
1903C
Theofanis' Nightmare
constructive algorithms
,
greedy
1400
x10307
1903B
StORage room
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1200
x11271
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x23773
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x890
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x3718
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3646
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12177
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13276
1902A
Binary Imbalance
constructive algorithms
800
x19704
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