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Rayan
→ Pay attention
Before contest
Codeforces Round 1006 (Div. 3)
33:18:47
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combine-tags-by-or
*combine tags by OR
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
1001F
Distinguish multi-qubit basis states
*special problem
1300
x543
1001E
Distinguish Bell states
*special problem
1600
x559
1001D
Distinguish plus state and minus state
*special problem
1400
x685
1001C
Generate GHZ state
*special problem
1400
x657
1001B
Generate Bell state
*special problem
1400
x714
1001A
Generate plus state or minus state
*special problem
1100
x1018
1000G
Two-Paths
data structures
,
dp
,
trees
2700
x620
1000F
One Occurrence
data structures
,
divide and conquer
2400
x4071
1000E
We Need More Bosses
dfs and similar
,
graphs
,
trees
2100
x4956
1000D
Yet Another Problem On a Subsequence
combinatorics
,
dp
1900
x4423
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x7047
1000B
Light It Up
greedy
1500
x5944
1000A
Codehorses T-shirts
greedy
,
implementation
1200
x8940
999F
Cards and Joy
dp
2000
x2823
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6933
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4481
999C
Alphabetic Removals
implementation
1200
x18904
999B
Reversing Encryption
implementation
900
x18134
999A
Mishka and Contest
brute force
,
implementation
800
x23718
998B
Cutting
dp
,
greedy
,
sortings
1200
x13563
998A
Balloons
constructive algorithms
,
implementation
1000
x9739
997E
Good Subsegments
data structures
3000
x1376
997D
Cycles in product
combinatorics
,
divide and conquer
,
trees
2900
x480
997C
Sky Full of Stars
combinatorics
,
math
2500
x1817
997B
Roman Digits
brute force
,
combinatorics
,
dp
,
greedy
,
math
2000
x3020
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8367
996B
World Cup
binary search
,
math
1300
x9200
996A
Hit the Lottery
dp
,
greedy
800
x97021
995F
Cowmpany Cowmpensation
combinatorics
,
dp
,
math
,
trees
2700
x1302
995E
Number Clicker
divide and conquer
,
graphs
,
meet-in-the-middle
,
number theory
2700
x711
995D
Game
math
2500
x783
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1936
995B
Suit and Tie
greedy
,
implementation
,
math
1400
x7145
995A
Tesla
constructive algorithms
,
implementation
2100
x1716
994B
Knights of a Polygonal Table
greedy
,
implementation
,
sortings
1400
x5796
994A
Fingerprints
implementation
800
x14393
993F
The Moral Dilemma
3200
x65
993E
Nikita and Order Statistics
chinese remainder theorem
,
fft
,
math
2300
x1473
993D
Compute Power
binary search
,
dp
,
greedy
2500
x763
993C
Careful Maneuvering
bitmasks
,
brute force
,
geometry
2100
x1721
993B
Open Communication
bitmasks
,
brute force
1900
x1975
993A
Two Squares
geometry
,
implementation
1600
x4191
992E
Nastya and King-Shamans
binary search
,
data structures
2500
x1501
992D
Nastya and a Game
brute force
,
implementation
,
math
2100
x1671
992C
Nastya and a Wardrobe
math
1600
x4640
992B
Nastya Studies Informatics
math
,
number theory
1600
x6365
992A
Nastya and an Array
implementation
,
sortings
800
x13417
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x314
991E
Bus Number
brute force
,
combinatorics
,
math
1800
x3535
991D
Bishwock
dp
,
greedy
1500
x7296
991C
Candies
binary search
,
implementation
1500
x10768
991B
Getting an A
greedy
,
sortings
900
x12848
991A
If at first you don't succeed...
implementation
1000
x10761
990G
GCD Counting
divide and conquer
,
dp
,
dsu
,
number theory
,
trees
2400
x1943
990F
Flow Control
dfs and similar
,
dp
,
greedy
,
trees
2400
x945
990E
Post Lamps
brute force
,
greedy
2100
x2057
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3899
990C
Bracket Sequences Concatenation Problem
implementation
1500
x5983
990B
Micro-World
greedy
,
sortings
1200
x8243
990A
Commentary Boxes
implementation
,
math
1000
x10740
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x256
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x522
989C
A Mist of Florescence
constructive algorithms
,
graphs
1800
x3861
989B
A Tide of Riverscape
constructive algorithms
,
strings
1200
x7102
989A
A Blend of Springtime
implementation
,
strings
900
x10607
988F
Rain and Umbrellas
dp
2100
x2392
988E
Divisibility by 25
brute force
,
greedy
2100
x4067
988D
Points and Powers of Two
brute force
,
math
1800
x7461
988C
Equal Sums
implementation
,
sortings
1400
x10437
988B
Substrings Sort
sortings
,
strings
1100
x18953
988A
Diverse Team
brute force
,
implementation
800
x25928
987C
Three displays
brute force
,
dp
,
implementation
1400
x13846
987B
High School: Become Human
math
1100
x11755
987A
Infinity Gauntlet
implementation
800
x16864
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x654
986E
Prince's Problem
brute force
,
data structures
,
math
,
number theory
,
trees
2800
x810
986D
Perfect Encoding
fft
,
math
3100
x337
986C
AND Graph
bitmasks
,
dfs and similar
,
dsu
,
graphs
2500
x2504
986B
Petr and Permutations
combinatorics
,
math
1800
x4761
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x7254
985G
Team Players
combinatorics
2700
x569
985F
Isomorphic Strings
hashing
,
strings
2300
x1910
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3736
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2606
985C
Liebig's Barrels
greedy
1500
x5835
985B
Switches and Lamps
implementation
1200
x7498
985A
Chess Placing
implementation
1100
x8235
984B
Minesweeper
implementation
1100
x7653
984A
Game
sortings
800
x19745
983E
NN country
binary search
,
data structures
,
trees
2800
x999
983D
Arkady and Rectangles
data structures
3300
x432
983C
Elevator
dp
,
graphs
,
shortest paths
2400
x847
983B
XOR-pyramid
dp
1800
x5708
983A
Finite or not?
implementation
,
math
1700
x4586
982F
The Meeting Place Cannot Be Changed
dfs and similar
,
graphs
2700
x199
982E
Billiard
geometry
,
number theory
2600
x736
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2370
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x12221
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8503
982A
Row
brute force
,
constructive algorithms
1200
x9208
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