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Rayan
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Before contest
Codeforces Round 1006 (Div. 3)
41:21:03
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Difficulty:
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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
1374B
Multiply by 2, divide by 6
math
900
x54251
1374A
Required Remainder
math
800
x56161
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x830
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1696
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2788
1373D
Maximum Sum on Even Positions
divide and conquer
,
dp
,
greedy
,
implementation
1600
x15968
1373C
Pluses and Minuses
math
1300
x18576
1373B
01 Game
games
900
x38686
1373A
Donut Shops
greedy
,
implementation
,
math
1000
x27681
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x460
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1287
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5474
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x18168
1372B
Omkar and Last Class of Math
greedy
,
math
,
number theory
1300
x29510
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x32260
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x630
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2385
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x5317
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x13126
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20781
1371B
Magical Calendar
math
1200
x19300
1371A
Magical Sticks
math
800
x47353
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1529
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1653
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4960
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9931
1370C
Number Game
games
,
math
,
number theory
1400
x25229
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x24013
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x54959
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x669
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2301
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8783
1369C
RationalLee
greedy
,
math
,
sortings
,
two pointers
1400
x19870
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x24731
1369A
FashionabLee
geometry
,
math
800
x37229
1368H2
Breadboard Capacity (hard version)
3500
x243
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x376
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x618
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1067
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2261
1368D
AND, OR and square sum
bitmasks
,
greedy
,
math
1700
x12157
1368C
Even Picture
constructive algorithms
1500
x13579
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x20158
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x41129
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1713
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3350
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5551
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x8457
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x23919
1367B
Even Array
greedy
,
math
800
x56014
1367A
Short Substrings
implementation
,
strings
800
x59580
1366G
Construct the String
data structures
,
dp
,
strings
2700
x570
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x836
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4346
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x10918
1366C
Palindromic Paths
greedy
,
math
1500
x13711
1366B
Shuffle
math
,
two pointers
1300
x22110
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x30914
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1203
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4514
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7970
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x18214
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x23587
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x27432
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24354
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1457
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4508
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x13430
1364B
Most socially-distanced subsequence
greedy
,
two pointers
1300
x20869
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x28962
1363F
Rotating Substrings
dp
,
strings
2600
x1598
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6934
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4136
1363C
Game On Leaves
games
,
trees
1600
x19316
1363B
Subsequence Hate
implementation
,
strings
1400
x24168
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x36993
1362C
Johnny and Another Rating Drop
bitmasks
,
greedy
,
math
1400
x19345
1362B
Johnny and His Hobbies
bitmasks
,
brute force
1200
x19737
1362A
Johnny and Ancient Computer
implementation
1000
x25604
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x158
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x738
1361D
Johnny and James
greedy
,
implementation
,
math
,
trees
2900
x324
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1676
1361B
Johnny and Grandmaster
greedy
,
implementation
,
math
,
sortings
1900
x3721
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8514
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4653
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7927
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x12681
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x26028
1360D
Buying Shovels
math
,
number theory
1300
x35009
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x33592
1360B
Honest Coach
greedy
,
sortings
800
x49304
1360A
Minimal Square
greedy
,
math
800
x52652
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x547
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x6243
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9750
1359C
Mixing Water
binary search
,
math
1700
x14169
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x28260
1359A
Berland Poker
brute force
,
greedy
,
math
1000
x30184
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x470
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