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Codeforces Round 953 (Div. 2)
07:56:26
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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
x818
1985H1
Maximize the Largest Component (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
x3336
1985G
D-Function
combinatorics
,
math
,
number theory
x5696
1985F
Final Boss
binary search
,
data structures
x9749
1985E
Secret Box
brute force
,
combinatorics
,
math
x14296
1985D
Manhattan Circle
implementation
,
math
x25863
1985C
Good Prefixes
greedy
x22715
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
x33539
1985A
Creating Words
implementation
,
strings
x36977
1984H
Tower Capturing
combinatorics
,
dp
,
geometry
3300
x92
1984G
Magic Trick II
constructive algorithms
,
implementation
,
sortings
3200
x116
1984F
Reconstruction
brute force
,
dp
,
math
2500
x608
1984E
Shuffle
dp
,
greedy
,
trees
2400
x947
1984D
''a'' String Problem
brute force
,
hashing
,
implementation
,
math
,
string suffix structures
,
strings
2000
x2302
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x5339
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x11655
1984B
Large Addition
implementation
,
math
1100
x13634
1984A
Strange Splitting
constructive algorithms
800
x16623
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x156
1981E
Turtle and Intersected Segments
data structures
,
dsu
,
graphs
,
greedy
2600
x532
1981D
Turtle and Multiplication
constructive algorithms
,
dfs and similar
,
graphs
,
number theory
2400
x1099
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1800
x3806
1981B
Turtle and an Infinite Sequence
bitmasks
,
math
1300
x10617
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x18269
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x807
1980F2
Field Division (hard version)
math
,
sortings
2400
x659
1980F1
Field Division (easy version)
data structures
,
math
,
sortings
1900
x2753
1980E
Permutation of Rows and Columns
constructive algorithms
,
data structures
,
greedy
,
hashing
,
implementation
,
math
,
matrices
,
sortings
1600
x7883
1980D
GCD-sequence
greedy
,
implementation
,
math
,
number theory
1400
x10990
1980C
Sofia and the Lost Operations
constructive algorithms
,
greedy
1300
x14958
1980B
Choosing Cubes
sortings
,
sortings
800
x29216
1980A
Problem Generator
math
800
x33814
1979F
Kostyanych's Theorem
brute force
,
constructive algorithms
,
graphs
,
interactive
2900
x172
1979E
Manhattan Triangle
binary search
,
constructive algorithms
,
data structures
,
geometry
,
implementation
,
two pointers
2400
x952
1979D
Fixing a Binary String
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
1800
x4916
1979C
Earning on Bets
binary search
,
combinatorics
,
constructive algorithms
,
number theory
1200
x14843
1979B
XOR Sequences
bitmasks
,
greedy
1000
x18632
1979A
Guess the Maximum
brute force
,
greedy
,
implementation
800
x24353
1977E
Tensor
constructive algorithms
,
graphs
,
interactive
2600
x471
1977D
XORificator
bitmasks
,
brute force
,
greedy
,
hashing
2300
x1380
1977C
Nikita and LCM
brute force
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
sortings
1900
x5348
1977B
Binary Colouring
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x15107
1977A
Little Nikita
math
800
x26189
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x372
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
2500
x717
1976D
Invertible Bracket Sequences
binary search
,
combinatorics
,
data structures
,
divide and conquer
,
implementation
,
two pointers
2000
x3159
1976C
Job Interview
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1600
x8134
1976B
Increase/Decrease/Copy
greedy
,
implementation
1100
x18506
1976A
Verify Password
implementation
,
sortings
,
strings
800
x23996
1975I
Mind Bloom
dp
3500
x41
1975H
378QAQ and Core
greedy
,
strings
3500
x60
1975G
Zimpha Fan Club
fft
,
greedy
,
math
,
strings
3000
x173
1975F
Set
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
math
2600
x615
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x1761
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x4713
1975C
Chamo and Mocha's Array
binary search
,
brute force
,
greedy
1200
x11864
1975B
378QAQ and Mocha's Array
brute force
,
greedy
,
math
,
sortings
1000
x14672
1975A
Bazoka and Mocha's Array
brute force
,
greedy
,
implementation
,
sortings
800
x16380
1974G
Money Buys Less Happiness Now
data structures
,
greedy
,
sortings
2000
x3437
1974F
Cutting Game
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x2906
1974E
Money Buys Happiness
dp
1800
x6288
1974D
Ingenuity-2
constructive algorithms
,
greedy
,
implementation
1400
x12297
1974C
Beautiful Triple Pairs
combinatorics
,
data structures
1400
x13221
1974B
Symmetric Encoding
implementation
,
sortings
,
strings
800
x27085
1974A
Phone Desktop
greedy
,
math
800
x29484
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x157
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
2500
x645
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1617
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x6973
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x11973
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x20992
1972B
Coin Games
games
900
x18481
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x20391
1971H
±1
2-sat
,
dfs and similar
,
graphs
2100
x1362
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x7708
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x8221
1971E
Find the Car
binary search
,
math
,
sortings
1500
x11609
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x22269
1971C
Clock and Strings
implementation
900
x27840
1971B
Different String
implementation
,
strings
800
x31586
1971A
My First Sorting Problem
implementation
,
sortings
800
x38142
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x242
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x415
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x954
1970F3
Playing Quidditch (Hard)
implementation
2300
x291
1970F2
Playing Quidditch (Medium)
implementation
2300
x282
1970F1
Playing Quidditch (Easy)
implementation
2300
x353
1970E3
Trails (Hard)
dp
,
matrices
2200
x472
1970E2
Trails (Medium)
dp
,
matrices
2000
x851
1970E1
Trails (Easy)
dp
1800
x1363
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
x466
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x1007
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1742
1970C1
Game on Tree (Easy)
games
1400
x2249
1970B3
Exact Neighbours (Hard)
constructive algorithms
2300
x359
1970B2
Exact Neighbours (Medium)
constructive algorithms
2100
x561
1970B1
Exact Neighbours (Easy)
constructive algorithms
1900
x802
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x372
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