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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
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71224
492A
Vanya and Cubes
implementation
800
x46789
491C
Deciphering
flows
,
graph matchings
2300
x399
491B
New York Hotel
greedy
,
math
2100
x536
491A
Up the hill
constructive algorithms
,
implementation
1000
x2821
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1552
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1516
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2069
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8908
490B
Queue
dsu
,
implementation
1500
x5901
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55585
489F
Special Matrices
combinatorics
,
dp
2100
x1595
489E
Hiking
binary search
,
dp
2300
x998
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6545
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44520
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46567
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9828
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2079
488A
Giga Tower
brute force
1100
x14054
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2136
487D
Conveyor Belts
data structures
2700
x838
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x2509
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3352
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3660
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2025
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x3853
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11500
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x16932
486A
Calculating Function
implementation
,
math
800
x109541
485B
Valuable Resources
brute force
,
greedy
1300
x6446
485A
Factory
implementation
,
math
,
matrices
1400
x8092
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2166
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2416
484C
Strange Sorting
implementation
,
math
2600
x580
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6780
484A
Bits
bitmasks
,
constructive algorithms
1700
x10697
483B
Friends and Presents
binary search
,
math
1800
x3991
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22217
482E
ELCA
data structures
,
trees
3200
x175
482D
Random Function and Tree
combinatorics
,
dp
,
trees
2700
x520
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x872
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6163
482A
Diverse Permutation
constructive algorithms
,
greedy
1200
x9509
480E
Parking Lot
data structures
,
divide and conquer
2800
x512
480D
Parcels
dp
,
graphs
2600
x452
479E
Riding in a Lift
combinatorics
,
dp
1900
x4935
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4706
479C
Exams
greedy
,
sortings
1400
x28545
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7548
479A
Expression
brute force
,
math
1000
x88770
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x204
478D
Red-Green Towers
dp
2000
x5476
478C
Table Decorations
greedy
1800
x17476
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35275
478A
Initial Bet
implementation
1100
x25018
477E
Dreamoon and Notepad
data structures
3100
x131
477D
Dreamoon and Binary
dp
,
strings
2700
x500
476E
Dreamoon and Strings
dp
,
strings
2200
x1758
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4320
476C
Dreamoon and Sums
math
1600
x5408
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29062
476A
Dreamoon and Stairs
implementation
,
math
1000
x41156
475F
Meta-universe
data structures
2900
x225
475E
Strongly Connected City 2
dfs and similar
2700
x403
475D
CGCDSSQ
brute force
,
data structures
,
math
2000
x4472
475C
Kamal-ol-molk's Painting
brute force
,
constructive algorithms
,
greedy
2100
x777
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8236
475A
Bayan Bus
implementation
1100
x4686
474F
Ant colony
data structures
,
math
,
number theory
2100
x7709
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3117
474D
Flowers
dp
1700
x23929
474C
Captain Marmot
brute force
,
geometry
2000
x3066
474B
Worms
binary search
,
implementation
1200
x44845
474A
Keyboard
implementation
900
x42766
472G
Design Tutorial: Increase the Constraints
bitmasks
,
data structures
,
fft
2800
x392
472F
Design Tutorial: Change the Goal
constructive algorithms
,
math
,
matrices
2700
x249
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x128
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5014
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6314
472B
Design Tutorial: Learn from Life
1300
x7377
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57037
471E
MUH and Lots and Lots of Segments
data structures
,
dsu
2700
x80
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x7451
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3535
471B
MUH and Important Things
implementation
,
sortings
1300
x5886
471A
MUH and Sticks
implementation
1100
x13326
470H
Array Sorting
*special problem
2300
x183
470G
Hamming Distance
*special problem
2300
x90
470F
Pairwise Sums
*special problem
2300
x96
470E
Chessboard
*special problem
1900
x191
470D
Caesar Cipher
*special problem
1900
x145
470C
Eval
*special problem
1900
x231
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x251
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x665
469B
Chat Online
implementation
1300
x12324
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91495
468E
Permanent
dp
,
graph matchings
,
math
,
meet-in-the-middle
3100
x308
468D
Tree
graph matchings
3100
x354
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2249
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x3945
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