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Codeforces Round 953 (Div. 2)
3 days
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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
1985H2
Maximize the Largest Component (Hard Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
implementation
x661
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
x2884
1985G
D-Function
combinatorics
,
math
,
number theory
x4969
1985F
Final Boss
binary search
,
data structures
x8550
1985E
Secret Box
brute force
,
combinatorics
,
math
x13153
1985D
Manhattan Circle
implementation
,
math
x24511
1985C
Good Prefixes
greedy
x21093
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
x31890
1985A
Creating Words
implementation
,
strings
x35042
1984H
Tower Capturing
combinatorics
,
dp
,
geometry
3300
x91
1984G
Magic Trick II
constructive algorithms
,
implementation
,
sortings
3200
x105
1984F
Reconstruction
dp
,
math
2500
x569
1984E
Shuffle
dp
,
greedy
,
trees
2400
x902
1984D
''a'' String Problem
brute force
,
hashing
,
implementation
,
math
,
string suffix structures
,
strings
2000
x2166
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x5095
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x11040
1984B
Large Addition
implementation
,
math
1100
x12968
1984A
Strange Splitting
constructive algorithms
800
x15987
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x147
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x511
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
2400
x1057
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1800
x3696
1981B
Turtle and an Infinite Sequence
bitmasks
,
math
1300
x10380
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x17919
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x771
1980F2
Field Division (hard version)
math
,
sortings
2400
x629
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x2672
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x7717
1980D
GCD-sequence
greedy
,
implementation
,
math
,
number theory
1400
x10752
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
1300
x14684
1980B
Choosing Cubes
sortings
,
sortings
800
x28879
1980A
Problem Generator
math
800
x33438
1979F
Kostyanych's Theorem
brute force
,
constructive algorithms
,
graphs
,
interactive
2900
x161
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x915
1979D
Fixing a Binary String
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
1800
x4761
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x14451
1979B
XOR Sequences
bitmasks
,
greedy
1000
x18215
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x23761
1977E
Tensor
constructive algorithms
,
graphs
,
interactive
2600
x461
1977D
XORificator
bitmasks
,
brute force
,
greedy
,
hashing
2300
x1355
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x5293
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x14967
1977A
Little Nikita
math
800
x25918
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x363
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
2500
x705
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
2000
x3101
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x8007
1976B
Increase/Decrease/Copy
greedy
,
implementation
1100
x18270
1976A
Verify Password
implementation
,
sortings
,
strings
800
x23719
1975I
Mind Bloom
dp
3500
x39
1975H
378QAQ and Core
greedy
,
strings
3500
x58
1975G
Zimpha Fan Club
fft
,
greedy
,
math
,
strings
3000
x172
1975F
Set
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
math
2600
x604
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x1744
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x4673
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x11731
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x14520
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x16277
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3402
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x2876
1974E
Money Buys Happiness
dp
1800
x6213
1974D
Ingenuity-2
constructive algorithms
,
greedy
,
implementation
1400
x12194
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x13131
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x26947
1974A
Phone Desktop
greedy
,
math
800
x29315
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x156
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
2500
x641
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1608
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x6920
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x11885
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x20853
1972B
Coin Games
games
900
x18347
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x20273
1971H
±1
2-sat
,
dfs and similar
,
graphs
2100
x1345
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x7647
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x8143
1971E
Find the Car
binary search
,
math
,
sortings
1500
x11522
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x22146
1971C
Clock and Strings
implementation
900
x27692
1971B
Different String
implementation
,
strings
800
x31441
1971A
My First Sorting Problem
implementation
,
sortings
800
x37964
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x239
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x412
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x942
1970F3
Playing Quidditch (Hard)
implementation
2300
x289
1970F2
Playing Quidditch (Medium)
implementation
2300
x280
1970F1
Playing Quidditch (Easy)
implementation
2300
x351
1970E3
Trails (Hard)
dp
,
matrices
2200
x469
1970E2
Trails (Medium)
dp
,
matrices
2000
x841
1970E1
Trails (Easy)
dp
1800
x1337
1970D3
Arithmancy (Hard)
interactive
3100
x83
1970D2
Arithmancy (Medium)
constructive algorithms
,
interactive
,
probabilities
,
strings
2600
x150
1970D1
Arithmancy (Easy)
brute force
,
constructive algorithms
,
interactive
,
strings
2100
x463
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x989
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1704
1970C1
Game on Tree (Easy)
games
1400
x2206
1970B3
Exact Neighbours (Hard)
constructive algorithms
2300
x359
1970B2
Exact Neighbours (Medium)
constructive algorithms
2100
x557
1970B1
Exact Neighbours (Easy)
constructive algorithms
1900
x798
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x371
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