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Name
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
x214
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
x268
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
x833
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
x3118
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
x6687
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
x13629
1957A
Stickogon
constructive algorithms
,
greedy
x18143
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x231
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x586
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1110
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x2893
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x9834
1956B
Nene and the Card Game
games
,
greedy
800
x17698
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17849
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x919
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3089
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5467
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6645
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x11995
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x16566
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x22386
1955A
Yogurt Sale
math
800
x34139
1954F
Unique Strings
combinatorics
,
dp
,
math
3100
x182
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1587
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x4516
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x14515
1954B
Make It Ugly
implementation
,
math
1200
x14437
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x19182
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x674
1952I
Dark Matter
bitmasks
,
geometry
x321
1952H
Palindrome
implementation
,
strings
x336
1952G
Mathematician Takeover
binary search
,
dfs and similar
,
math
x897
1952F
Grid
brute force
x1619
1952E
Sweep Line
combinatorics
,
games
,
math
x201
1952D
Are You a Procrastinator?
implementation
x4060
1952C
They Have Fooled
brute force
,
schedules
x2680
1952B
Is it stated?
strings
x10153
1952A
Are You a Robot, Again?
strings
x11215
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x38
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x179
1951G
Clacking Balls
combinatorics
,
math
,
probabilities
3100
x225
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x623
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x2874
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4513
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9105
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11448
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x15711
1950G
Shuffling Songs
bitmasks
,
dfs and similar
,
dp
,
graphs
,
hashing
,
implementation
,
strings
1900
x3274
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7189
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x11350
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x19508
1950C
Clock Conversion
implementation
,
math
800
x33720
1950B
Upscaling
implementation
800
x32135
1950A
Stair, Peak, or Neither?
implementation
800
x41933
1949K
Make Triangle
constructive algorithms
,
math
x222
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
x299
1949I
Disks
dfs and similar
,
geometry
,
graph matchings
,
graphs
x1047
1949H
Division Avoidance
greedy
,
math
x65
1949G
Scooter
graphs
,
greedy
x604
1949F
Dating
greedy
,
sortings
,
trees
x690
1949E
Damage per Second
brute force
,
math
x78
1949D
Funny or Scary?
constructive algorithms
x296
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
x1070
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1531
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
x80
1948G
MST with Matching
bitmasks
,
brute force
,
dsu
,
graph matchings
,
trees
3100
x580
1948F
Rare Coins
combinatorics
,
math
,
probabilities
2500
x1076
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2539
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x7996
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14071
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20089
1948A
Special Characters
brute force
,
constructive algorithms
800
x25861
1946F
Nobody is needed
2-sat
,
data structures
,
dfs and similar
,
dp
2500
x739
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2022
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3899
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8824
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17504
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23108
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x464
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x606
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3473
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6743
1945D
Seraphim the Owl
dp
,
greedy
1300
x11751
1945C
Left and Right Houses
brute force
1200
x12436
1945B
Fireworks
math
,
number theory
900
x19133
1945A
Setting up Camp
greedy
,
math
800
x24065
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x13938
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20749
1943F
Minimum Hamming Distance
dp
3500
x72
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x209
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x333
1943D2
Counting Is Fun (Hard Version)
combinatorics
,
dp
2800
x555
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1186
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1727
1943B
Non-Palindromic Substring
hashing
,
implementation
,
math
,
strings
2000
x3146
1943A
MEX Game 1
games
,
greedy
1300
x14885
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x54
1942G
Bessie and Cards
combinatorics
,
dp
,
math
2800
x352
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x534
1942E
Farm Game
combinatorics
,
games
2300
x1403
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
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data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
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interactive
math
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meet-in-the-middle
number theory
probabilities
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shortest paths
sortings
string suffix structures
strings
ternary search
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