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Codeforces Round 986 (Div. 2)
09:03:24
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math
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
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3792
1866M
Mighty Rock Tower
brute force
,
combinatorics
,
dp
,
math
,
probabilities
2400
x813
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x725
1866B
Battling with Numbers
combinatorics
,
math
,
number theory
1400
x7819
1866A
Ambitious Kid
math
800
x23058
1864H
Asterism Stream
dp
,
math
,
matrices
3200
x285
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2670
1864D
Matrix Cascade
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
1700
x6832
1864C
Divisor Chain
bitmasks
,
constructive algorithms
,
math
,
number theory
1300
x13602
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20378
1863G
Swaps
combinatorics
,
dp
,
graphs
,
math
2800
x647
1863F
Divide, XOR, and Conquer
bitmasks
,
dp
,
math
2600
x1148
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2787
1863C
MEX Repetition
implementation
,
math
1100
x14102
1863B
Split Sort
greedy
,
math
,
sortings
1100
x15373
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2916
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x17369
1861E
Non-Intersecting Subpermutations
combinatorics
,
dp
,
implementation
,
math
2300
x1755
1861A
Prime Deletion
constructive algorithms
,
math
800
x23995
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x280
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x17077
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1797
1859C
Another Permutation Problem
brute force
,
dp
,
greedy
,
math
1200
x17107
1859B
Olya and Game with Arrays
constructive algorithms
,
greedy
,
math
,
sortings
1000
x27771
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x33314
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x23228
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x11406
1858A
Buttons
games
,
greedy
,
math
800
x39578
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x11725
1857E
Power of Points
math
,
sortings
1500
x12608
1857D
Strong Vertices
math
,
sortings
,
trees
1300
x19883
1857B
Maximum Rounding
greedy
,
implementation
,
math
1100
x23143
1857A
Array Coloring
greedy
,
math
800
x49365
1856E2
PermuTree (hard version)
bitmasks
,
dfs and similar
,
dp
,
fft
,
greedy
,
implementation
,
math
,
trees
2700
x1435
1856B
Good Arrays
implementation
,
math
900
x24524
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x27336
1855A
Dalton the Teacher
greedy
,
math
800
x28065
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x432
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1529
1854A2
Dual (Hard Version)
constructive algorithms
,
math
1900
x7062
1854A1
Dual (Easy Version)
constructive algorithms
,
math
1400
x14234
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x17559
1853A
Desorting
brute force
,
greedy
,
math
800
x32678
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1613
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4528
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x8137
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5930
1851D
Prefix Permutation Sums
implementation
,
math
1300
x15370
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29629
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x12627
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x19501
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x23664
1849B
Monsters
greedy
,
math
,
sortings
1000
x26447
1849A
Morning Sandwich
implementation
,
math
800
x28603
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1638
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x795
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2647
1848C
Vika and Price Tags
math
,
number theory
1800
x6362
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x15403
1848A
Vika and Her Friends
games
,
math
900
x16927
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x905
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x333
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x7109
1846E1
Rudolf and Snowflakes (simple version)
brute force
,
implementation
,
math
1300
x17193
1846D
Rudolph and Christmas Tree
constructive algorithms
,
geometry
,
math
1200
x19591
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x32597
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x373
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1337
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7912
1845B
Come Together
geometry
,
implementation
,
math
900
x21722
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x28160
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x139
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x734
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x404
1844F1
Min Cost Permutation (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
math
2600
x786
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x12385
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x15804
1844B
Permutations & Primes
constructive algorithms
,
math
1000
x18313
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1633
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5373
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x18272
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x33598
1843B
Long Long
greedy
,
math
,
two pointers
800
x29133
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x683
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x1074
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1635
1842B
Tenzing and Books
bitmasks
,
greedy
,
math
1100
x17350
1842A
Tenzing and Tsondu
games
,
math
800
x19868
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x2037
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7898
1840G2
In Search of Truth (Hard Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2500
x980
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2405
1840C
Ski Resort
combinatorics
,
math
,
two pointers
1000
x28329
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x22565
1839A
The Good Array
greedy
,
implementation
,
math
800
x17530
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1494
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x14655
1838B
Minimize Permutation Subarrays
constructive algorithms
,
math
1100
x16503
1838A
Blackboard List
constructive algorithms
,
math
800
x21602
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x33241
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