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Problems
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Name
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
x4132
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
greedy
,
math
,
two pointers
x8178
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x17886
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x18756
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x112
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x939
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x3329
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x14363
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x11546
1968B
Prefiquence
greedy
,
two pointers
800
x22972
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x9322
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x14719
1965C
Folding Strip
constructive algorithms
,
greedy
,
strings
2300
x1430
1965B
Missing Subsequence Sum
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1800
x5112
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x10401
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x15142
1957A
Stickogon
constructive algorithms
,
greedy
800
x20138
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x682
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3249
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x10813
1956B
Nene and the Card Game
games
,
greedy
800
x18996
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19139
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5955
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7245
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x18012
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1814
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x15950
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x20655
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x45
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x201
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x653
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x3042
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4727
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9711
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x12189
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x16607
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7689
1949H
Division Avoidance
greedy
,
math
3100
x74
1949G
Scooter
graphs
,
greedy
2300
x648
1949F
Dating
greedy
,
sortings
,
trees
2200
x773
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
1900
x1242
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
1500
x1922
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2644
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20571
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x4068
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x9212
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x18066
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23680
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6998
1945D
Seraphim the Owl
dp
,
greedy
1300
x12267
1945A
Setting up Camp
greedy
,
math
800
x24843
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x21348
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x238
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x369
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1816
1943A
MEX Game 1
games
,
greedy
1300
x15458
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2445
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5511
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9600
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5234
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29860
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26567
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13183
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x419
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1107
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6606
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x397
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1175
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7184
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1205
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3094
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6075
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16770
1934A
Too Min Too Max
greedy
,
math
800
x23501
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17925
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35575
1932D
Card Game
greedy
,
implementation
1400
x9964
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26870
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13436
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x26220
1931B
Make Equal
greedy
800
x30114
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2378
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3707
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6437
1930A
Maximise The Score
greedy
,
sortings
800
x17218
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1518
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13338
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23862
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x29016
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1559
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3769
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15393
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1498
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3826
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18415
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25679
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30530
1927A
Make it White
greedy
,
strings
800
x39862
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2978
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13700
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