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#
Name
1966B
Rectangle Filling
constructive algorithms
x8247
1966A
Card Exchange
greedy
x10981
1965F
Conference
data structures
,
flows
x20
1965E
Connected Cubes
constructive algorithms
x86
1965D
Missing Subarray Sum
constructive algorithms
x136
1965C
Folding Strip
greedy
x869
1965B
Missing Subsequence Sum
constructive algorithms
,
greedy
,
number theory
x3152
1965A
Everything Nim
games
,
greedy
,
math
x6750
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
x218
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
x274
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
x843
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
x3144
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
x6721
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
x13687
1957A
Stickogon
constructive algorithms
,
greedy
x18242
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x235
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x591
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1115
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x2914
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x9872
1956B
Nene and the Card Game
games
,
greedy
800
x17774
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17914
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x926
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3102
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5480
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6666
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x12037
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x16621
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x22464
1955A
Yogurt Sale
math
800
x34267
1954F
Unique Strings
combinatorics
,
dp
,
math
3100
x182
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1590
1954D
Colored Balls
combinatorics
,
dp
,
math
,
sortings
1800
x4531
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x14571
1954B
Make It Ugly
implementation
,
math
1200
x14483
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x19244
1952J
Help, what does it mean to be "Based"
brute force
,
constructive algorithms
,
expression parsing
,
implementation
,
sortings
x674
1952I
Dark Matter
bitmasks
,
geometry
x322
1952H
Palindrome
implementation
,
strings
x337
1952G
Mathematician Takeover
binary search
,
dfs and similar
,
math
x898
1952F
Grid
brute force
x1619
1952E
Sweep Line
combinatorics
,
games
,
math
x202
1952D
Are You a Procrastinator?
implementation
x4066
1952C
They Have Fooled
brute force
,
schedules
x2684
1952B
Is it stated?
strings
x10168
1952A
Are You a Robot, Again?
strings
x11225
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x38
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x180
1951G
Clacking Balls
combinatorics
,
math
,
probabilities
3100
x226
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x624
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x2882
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4524
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9128
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11471
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x15768
1950G
Shuffling Songs
bitmasks
,
dfs and similar
,
dp
,
graphs
,
hashing
,
implementation
,
strings
1900
x3282
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7203
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x11374
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x19537
1950C
Clock Conversion
implementation
,
math
800
x33789
1950B
Upscaling
implementation
800
x32203
1950A
Stair, Peak, or Neither?
implementation
800
x42036
1949K
Make Triangle
constructive algorithms
,
math
x223
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
x305
1949I
Disks
dfs and similar
,
geometry
,
graph matchings
,
graphs
x1057
1949H
Division Avoidance
greedy
,
math
x68
1949G
Scooter
graphs
,
greedy
x612
1949F
Dating
greedy
,
sortings
,
trees
x698
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
x1082
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1542
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
x80
1948G
MST with Matching
bitmasks
,
brute force
,
dsu
,
graph matchings
,
trees
3100
x582
1948F
Rare Coins
combinatorics
,
math
,
probabilities
2500
x1077
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2542
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8001
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14082
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20111
1948A
Special Characters
brute force
,
constructive algorithms
800
x25886
1946F
Nobody is needed
2-sat
,
data structures
,
dfs and similar
,
dp
2500
x741
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2025
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3905
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8837
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17514
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23124
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
x608
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3476
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6748
1945D
Seraphim the Owl
dp
,
greedy
1300
x11765
1945C
Left and Right Houses
brute force
1200
x12446
1945B
Fireworks
math
,
number theory
900
x19154
1945A
Setting up Camp
greedy
,
math
800
x24094
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x13954
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20773
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
x334
1943D2
Counting Is Fun (Hard Version)
combinatorics
,
dp
2800
x560
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binary search
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fft
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