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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
22:03:57
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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
1905F
Field Should Not Be Empty
brute force
,
data structures
,
divide and conquer
2600
x505
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x898
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3647
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x336
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x889
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x4091
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x593
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1899
1903D2
Maximum And Queries (hard version)
bitmasks
,
divide and conquer
,
dp
,
greedy
2500
x737
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5365
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x945
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x4065
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3884
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x148
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1442
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6514
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x270
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1921
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
2000
x3933
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x3036
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x766
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2156
1898D
Absolute Beauty
greedy
,
math
1900
x4979
1898C
Colorful Grid
constructive algorithms
1700
x5185
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x98
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x87
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x321
1896F
Bracket Xoring
constructive algorithms
,
greedy
,
implementation
,
math
2600
x688
1896E
Permutation Sorting
data structures
,
sortings
2100
x2129
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5449
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x181
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x689
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1509
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5784
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x186
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x846
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x2530
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x8450
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3517
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x797
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3831
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x71
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x104
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x544
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x927
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3126
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x7027
1887F
Minimum Segments
constructive algorithms
3400
x124
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x342
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x846
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1649
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2817
1886F
Diamond Theft
data structures
,
greedy
3300
x162
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1387
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3436
1884E
Hard Design
greedy
,
implementation
,
math
2800
x271
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x3019
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x5771
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x5119
1883E
Look Back
bitmasks
,
greedy
1700
x7561
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x289
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x985
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x5189
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2254
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x6419
1879F
Last Man Standing
brute force
,
data structures
,
number theory
2800
x493
1879E
Interactive Game with Coloring
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
interactive
,
trees
2400
x1216
1879D
Sum of XOR Functions
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
1700
x7007
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1140
1878F
Vasilije Loves Number Theory
brute force
,
math
,
number theory
1900
x3957
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x119
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x127
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x261
1876D
Lexichromatography
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2500
x838
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2198
1874G
Jellyfish and Inscryption
dp
3500
x79
1874F
Jellyfish and OEIS
dp
3500
x193
1874E
Jellyfish and Hack
dp
,
math
3000
x293
1874D
Jellyfish and Miku
divide and conquer
,
dp
,
math
,
probabilities
2800
x680
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1557
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1108
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6954
1872G
Replace With Product
brute force
,
greedy
,
math
2000
x4112
1872F
Selling a Menagerie
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1800
x6045
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x80
1870G
MEXanization
data structures
3300
x208
1870F
Lazy Numbers
binary search
,
math
2900
x470
1870E
Another MEX Problem
bitmasks
,
brute force
,
dp
,
shortest paths
2300
x2276
1870D
Prefix Purchase
greedy
,
implementation
,
sortings
1800
x6649
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x72
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x78
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x258
1868C
Travel Plan
combinatorics
,
dp
,
implementation
,
math
,
trees
2400
x1109
1868B2
Candy Party (Hard Version)
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
implementation
,
math
2100
x2340
1868B1
Candy Party (Easy Version)
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
1700
x6737
1867F
Most Different Tree
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
hashing
2700
x406
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x3084
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3636
1867D
Cyclic Operations
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
1800
x5566
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x708
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