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Good Bye 2024: 2025 is NEAR
3 days
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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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Custom test
Problems
#
Name
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1249
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4524
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x14588
1697B
Promo
greedy
,
sortings
900
x27153
1697A
Parkway Walk
greedy
,
implementation
800
x25863
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x165
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x280
1696F
Tree Recovery
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
2600
x950
1696E
Placing Jinas
combinatorics
,
math
2000
x4163
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5536
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11783
1696B
NIT Destroys the Universe
greedy
900
x22393
1696A
NIT orz!
bitmasks
,
greedy
800
x18997
1695E
Ambiguous Dominoes
constructive algorithms
,
dfs and similar
,
graphs
2700
x454
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x2043
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2211
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x11122
1695B
Circle Game
games
,
greedy
1000
x18683
1695A
Subrectangle Guess
games
800
x16423
1694B
Paranoid String
constructive algorithms
,
greedy
1200
x19387
1694A
Creep
greedy
,
implementation
800
x22834
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x424
1693E
Outermost Maximums
data structures
,
greedy
3400
x434
1693D
Decinc Dividing
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
2800
x861
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2680
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8652
1693A
Directional Increase
greedy
1300
x16356
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7645
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x18487
1692F
3SUM
brute force
,
math
1300
x23371
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x23015
1692D
The Clock
brute force
,
implementation
1100
x19757
1692C
Where's the Bishop?
implementation
800
x34887
1692B
All Distinct
greedy
,
sortings
800
x34841
1692A
Marathon
implementation
800
x67825
1691F
K-Set Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2500
x1005
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1864
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5919
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15865
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x23906
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x30774
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3466
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x7289
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x15438
1690D
Black and White Stripe
implementation
,
two pointers
1000
x31120
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x26411
1690B
Array Decrements
greedy
,
implementation
800
x25748
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x33873
1689E
ANDfinity
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1238
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4275
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x11468
1689B
Mystic Permutation
data structures
,
greedy
900
x17726
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16874
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x8226
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x18377
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x21896
1687F
Koishi's Unconscious Permutation
fft
,
math
3500
x87
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x235
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x616
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1443
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3709
1687A
The Enchanted Forest
brute force
,
greedy
1600
x10511
1686B
Odd Subarrays
dp
,
greedy
800
x18416
1686A
Everything Everywhere All But One
greedy
800
x20554
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x154
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x108
1685D1
Permutation Weight (Easy Version)
constructive algorithms
,
dfs and similar
,
dsu
2800
x451
1685C
Bring Balance
brute force
,
constructive algorithms
,
greedy
2600
x1103
1685B
Linguistics
greedy
,
implementation
,
sortings
,
strings
2000
x3316
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x17350
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x245
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x622
1684F
Diverse Segments
data structures
,
two pointers
2600
x929
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3215
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x9862
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x12469
1684B
Z mod X = C
constructive algorithms
,
math
800
x21116
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x24053
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x320
1682E
Unordered Swaps
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
,
trees
2700
x626
1682D
Circular Spanning Tree
constructive algorithms
,
implementation
,
trees
2000
x3362
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x15009
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x19140
1682A
Palindromic Indices
greedy
,
strings
800
x19364
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1823
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x807
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9798
1681C
Double Sort
implementation
,
sortings
1200
x17575
1681B
Card Trick
implementation
,
math
800
x20231
1681A
Game with Cards
games
,
greedy
800
x21083
1680F
Lenient Vertex Cover
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x684
1680E
Moving Chips
bitmasks
,
dp
,
greedy
2000
x3848
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1190
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x10108
1680B
Robots
implementation
800
x18502
1680A
Minimums and Maximums
brute force
,
math
800
x21700
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x578
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x1216
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x4981
1679C
Rooks Defenders
data structures
,
implementation
1400
x10516
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