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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
46:12:53
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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
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Problems
#
Name
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2358
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8316
1358C
Celex Update
math
1600
x17664
1358B
Maria Breaks the Self-isolation
greedy
,
sortings
1000
x25155
1358A
Park Lighting
greedy
,
math
800
x40415
1357E2
Root of quantum Fourier transform
*special problem
x51
1357E1
Power of quantum Fourier transform
*special problem
x193
1357D5
Quantum Classification - Dataset 7
*special problem
x82
1357D4
Quantum Classification - Dataset 6
*special problem
x85
1357D3
Quantum Classification - Dataset 5
*special problem
x105
1357D2
Quantum Classification - Dataset 4
*special problem
x112
1357D1
Quantum Classification - Dataset 3
*special problem
x125
1357C2
Prepare superposition of basis states with the same parity
*special problem
x304
1357C1
Prepare superposition of basis states with 0s
*special problem
x348
1357B2
"Is the number divisible by 3?" oracle
*special problem
x214
1357B1
"Is the bit string balanced?" oracle
*special problem
x214
1357A7
Distinguish Y, XZ, -Y and -XZ
*special problem
x183
1357A6
Distinguish four Pauli gates
*special problem
x168
1357A5
Distinguish Rz(θ) from Ry(θ)
*special problem
x241
1357A4
Distinguish Rz from R1
*special problem
x352
1357A3
Distinguish H from X
*special problem
x479
1357A2
Distinguish I, CNOTs and SWAP
*special problem
x511
1357A1
Figure out direction of CNOT
*special problem
x632
1356D2
Quantum Classification - 2
*special problem
x128
1356D1
Quantum Classification - 1
*special problem
x137
1356C
Prepare state |01⟩ + |10⟩ + |11⟩
*special problem
x303
1356B2
Decrement
*special problem
x283
1356B1
Increment
*special problem
x283
1356A5
Distinguish Z from -Z
*special problem
x331
1356A4
Distinguish I ⊗ X from CNOT
*special problem
x459
1356A3
Distinguish Z from S
*special problem
x461
1356A2
Distinguish I from Z
*special problem
x488
1356A1
Distinguish I from X
*special problem
x603
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x889
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x5304
1355D
Game With Array
constructive algorithms
,
math
1400
x18300
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10874
1355B
Young Explorers
dp
,
greedy
,
sortings
1200
x26126
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x27173
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x810
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x1259
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3462
1354D
Multiset
binary search
,
data structures
1900
x9108
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x6149
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15922
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x31908
1354A
Alarm Clock
math
900
x24092
1353F
Decreasing Heights
brute force
,
dp
2200
x3406
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x7322
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x18580
1353C
Board Moves
math
1000
x36276
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x51309
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x41828
1352G
Special Permutation
constructive algorithms
1600
x22224
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x17820
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x21469
1352D
Alice, Bob and Candies
implementation
1300
x27134
1352C
K-th Not Divisible by n
binary search
,
math
1200
x58368
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x39287
1352A
Sum of Round Numbers
implementation
,
math
800
x85589
1351C
Skier
data structures
,
implementation
1400
x8763
1351B
Square?
brute force
,
implementation
,
math
900
x17367
1351A
A+B (Trial Problem)
implementation
800
x24665
1350B
Orac and Models
dp
,
math
,
number theory
1400
x23656
1350A
Orac and Factors
math
900
x26371
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x119
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x459
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x105
1349D
Slime and Biscuits
math
,
probabilities
3200
x940
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4591
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8318
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x18050
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x834
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2277
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x9003
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14846
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25892
1348A
Phoenix and Balance
greedy
,
math
800
x40340
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x51
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x52
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x139
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x232
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x383
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x517
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x614
1346B
Boot Camp
*special problem
,
greedy
1400
x1222
1346A
Color Revolution
*special problem
,
math
1000
x2070
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x27024
1345A
Puzzle Pieces
math
800
x24388
1344F
Piet's Palette
matrices
3200
x461
1344E
Train Tracks
data structures
,
trees
3100
x476
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1201
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1891
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6157
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15861
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1307
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x5293
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12908
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x39649
1343B
Balanced Array
constructive algorithms
,
math
800
x58586
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