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Before contest
Codeforces Round 941 (Div. 1)
18:59:52
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Before contest
Codeforces Round 941 (Div. 2)
18:59:53
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greedy
combine-tags-by-or
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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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Problems
#
Name
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
x13435
1957A
Stickogon
constructive algorithms
,
greedy
x17876
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x575
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x2857
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x9762
1956B
Nene and the Card Game
games
,
greedy
800
x17571
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17723
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5427
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x6599
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x16467
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1572
1954C
Long Multiplication
greedy
,
math
,
number theory
1200
x14429
1954A
Painting the Ribbon
constructive algorithms
,
greedy
,
math
900
x19087
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x37
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x177
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x619
1951E
No Palindromes
brute force
,
constructive algorithms
,
divide and conquer
,
greedy
,
hashing
,
implementation
,
math
,
strings
2000
x2858
1951D
Buying Jewels
constructive algorithms
,
greedy
,
math
2000
x4497
1951C
Ticket Hoarding
greedy
,
math
,
sortings
1400
x9052
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11394
1951A
Dual Trigger
constructive algorithms
,
greedy
,
math
900
x15671
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x7165
1949H
Division Avoidance
greedy
,
math
x65
1949G
Scooter
graphs
,
greedy
x601
1949F
Dating
greedy
,
sortings
,
trees
x687
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
x1066
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1528
1948E
Clique Partition
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2100
x2536
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20068
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3888
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8808
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17485
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23073
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6735
1945D
Seraphim the Owl
dp
,
greedy
1300
x11733
1945A
Setting up Camp
greedy
,
math
800
x24020
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20718
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
x330
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1724
1943A
MEX Game 1
games
,
greedy
1300
x14857
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2354
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5359
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9259
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5082
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29208
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x25977
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12872
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x403
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1054
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6460
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x381
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1146
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7029
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1164
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3012
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5955
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16365
1934A
Too Min Too Max
greedy
,
math
800
x23107
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17484
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35046
1932D
Card Game
greedy
,
implementation
1400
x9722
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26307
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13122
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x25774
1931B
Make Equal
greedy
800
x29756
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2339
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3647
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6323
1930A
Maximise The Score
greedy
,
sortings
800
x16975
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1476
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13075
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x23615
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x28667
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1509
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3696
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15071
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1477
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3685
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18052
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x25319
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30077
1927A
Make it White
greedy
,
strings
800
x39355
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2892
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13311
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x18071
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27014
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12195
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x319
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5785
1923C
Find B
constructive algorithms
,
greedy
1400
x12920
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x15993
1923A
Moving Chips
greedy
,
implementation
800
x23049
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6965
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16712
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8824
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19839
1921C
Sending Messages
greedy
,
math
900
x27088
1921B
Arranging Cats
greedy
,
implementation
800
x31811
1921A
Square
greedy
,
math
800
x39637
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