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greedy
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
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
trees
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Problems
#
Name
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
x14419
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x94
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x776
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x2863
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x12811
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
x9814
1968B
Prefiquence
greedy
,
two pointers
x20400
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
x7914
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x13521
1965C
Folding Strip
constructive algorithms
,
greedy
,
strings
2300
x1321
1965B
Missing Subsequence Sum
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1800
x4608
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x9255
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x14426
1957A
Stickogon
constructive algorithms
,
greedy
800
x19312
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x638
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3090
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x10361
1956B
Nene and the Card Game
games
,
greedy
800
x18461
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x18543
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5759
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6991
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x17491
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1730
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x15339
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x20034
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x41
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x193
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x644
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x2971
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4631
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9444
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11844
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x16227
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7471
1949H
Division Avoidance
greedy
,
math
3100
x69
1949G
Scooter
graphs
,
greedy
2300
x625
1949F
Dating
greedy
,
sortings
,
trees
2200
x722
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
1900
x1141
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x1700
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2602
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20377
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3984
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x9010
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17754
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23376
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6881
1945D
Seraphim the Owl
dp
,
greedy
1300
x12030
1945A
Setting up Camp
greedy
,
math
800
x24538
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x21073
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x225
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x356
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1786
1943A
MEX Game 1
games
,
greedy
1300
x15199
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2399
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5438
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9425
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5159
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29574
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26319
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13021
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x409
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1078
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6535
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x391
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1164
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7093
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1186
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3063
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6019
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16573
1934A
Too Min Too Max
greedy
,
math
800
x23299
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17696
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35323
1932D
Card Game
greedy
,
implementation
1400
x9843
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26613
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13272
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25974
1931B
Make Equal
greedy
800
x29924
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2357
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3675
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6392
1930A
Maximise The Score
greedy
,
sortings
800
x17106
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1505
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13188
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23737
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28827
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1537
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3724
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15207
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1489
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3776
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18212
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25501
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30287
1927A
Make it White
greedy
,
strings
800
x39618
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2931
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13481
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18175
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27112
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12300
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