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Rayan
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Before contest
Codeforces Round 1010 (Div. 1)
21:14:08
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*has extra registration
Before contest
Codeforces Round 1010 (Div. 2)
21:14:08
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→ Filter Problems
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
2080D
Order Statistics
*special problem
,
binary search
x10
2080C
Card Flip
*special problem
x63
2080B
Best Runner
*special problem
x123
2080A
Strong Connectivity Strikes Back
*special problem
,
constructive algorithms
,
graphs
x7
2079D
Cute Subsequences
*special problem
,
sortings
x276
2079C
Dreaming Is Not Harmful
*special problem
x110
2079B
Arithmetic Exercise
*special problem
,
data structures
,
dp
,
greedy
x72
2079A
Alice, Bob, And Two Arrays
*special problem
,
data structures
,
dp
,
games
x10
2078D
Scammy Game Ad
dp
,
greedy
x3322
2078B
Vicious Labyrinth
constructive algorithms
,
graphs
,
greedy
,
implementation
,
math
x12660
2078A
Final Verdict
math
x16857
2077G
RGB Walking
bitmasks
,
chinese remainder theorem
,
dfs and similar
,
graphs
,
number theory
x32
2077F
AND x OR
bitmasks
,
constructive algorithms
,
dp
x90
2077E
Another Folding Strip
combinatorics
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
x281
2077D
Maximum Polygon
brute force
,
data structures
,
implementation
,
math
x142
2077C
Binary Subsequence Value Sum
combinatorics
,
data structures
,
dp
,
fft
,
math
,
matrices
x1005
2077B
Finding OR Sum
bitmasks
,
constructive algorithms
,
implementation
,
interactive
,
math
x1870
2077A
Breach of Faith
constructive algorithms
,
greedy
,
math
,
sortings
x8511
2074G
Game With Triangles: Season 2
dp
,
geometry
x921
2074F
Counting Necessary Nodes
bitmasks
,
divide and conquer
,
geometry
,
greedy
,
implementation
,
math
x1427
2074E
Empty Triangle
geometry
,
interactive
,
probabilities
x4032
2074D
Counting Points
brute force
,
data structures
,
geometry
,
implementation
,
two pointers
x7131
2074C
XOR and Triangle
bitmasks
,
brute force
,
geometry
,
greedy
,
probabilities
x14912
2074B
The Third Side
geometry
,
greedy
,
math
x24663
2074A
Draw a Square
geometry
,
implementation
x29582
2073M
Can You Reach There?
x25
2073L
Boarding Queue
x920
2073K
Book Sorting
x113
2073J
Gathering Sharks
x567
2073I
Squares on Grid Lines
x54
2073H
Secret Lilies and Roses
interactive
x154
2073G
Corrupted File
x470
2073F
Hold the Star
x13
2073E
Minus Operator
interactive
x27
2073D
Tower of Hanoi
x268
2073C
Cactus Connectivity
x162
2073B
Three-Dimensional Embedding
x13
2073A
Control Towers
x674
2072G
I've Been Flipping Numbers for 300 Years and Calculated the Sum
binary search
,
brute force
,
combinatorics
,
divide and conquer
,
math
,
number theory
2200
x1414
2072F
Goodbye, Banker Life
2-sat
,
bitmasks
,
combinatorics
,
constructive algorithms
,
fft
,
math
,
number theory
1700
x5707
2072E
Do You Love Your Hero and His Two-Hit Multi-Target Attacks?
binary search
,
brute force
,
constructive algorithms
,
dp
,
geometry
,
greedy
,
math
1500
x8581
2072D
For Wizards, the Exam Is Easy, but I Couldn't Handle It
brute force
,
greedy
,
implementation
1300
x13135
2072C
Creating Keys for StORages Has Become My Main Skill
bitmasks
,
constructive algorithms
,
greedy
1200
x14469
2072B
Having Been a Treasurer in the Past, I Help Goblins Deceive
combinatorics
,
constructive algorithms
,
strings
900
x24181
2072A
New World, New Me, New Array
greedy
,
implementation
,
math
800
x33089
2071F
Towering Arrays
binary search
,
data structures
x131
2071E
LeaFall
combinatorics
,
dp
,
probabilities
,
trees
x224
2071D2
Infinite Sequence (Hard Version)
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
implementation
,
math
x606
2071D1
Infinite Sequence (Easy Version)
bitmasks
,
brute force
,
dp
,
implementation
,
math
x4382
2071C
Trapmigiano Reggiano
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
x6519
2071B
Perfecto
brute force
,
constructive algorithms
,
greedy
,
math
x15408
2071A
The Play Never Ends
math
,
number theory
x21857
2070F
Friends and Pizza
bitmasks
,
divide and conquer
,
dp
,
fft
3000
x190
2070E
Game with Binary String
constructive algorithms
,
data structures
,
divide and conquer
,
games
,
greedy
,
math
2200
x1159
2070D
Tree Jumps
dfs and similar
,
dp
,
trees
1600
x6822
2070C
Limited Repainting
binary search
,
greedy
1500
x9250
2070B
Robot Program
brute force
,
implementation
,
math
1100
x15409
2070A
FizzBuzz Remixed
brute force
,
math
800
x21139
2069F
Graph Inclusion
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
2800
x541
2069E
A, B, AB and BA
constructive algorithms
,
greedy
,
sortings
,
strings
2300
x1355
2069D
Palindrome Shuffle
binary search
,
greedy
,
hashing
,
strings
,
two pointers
1800
x5087
2069C
Beautiful Sequence
combinatorics
,
dp
,
greedy
,
two pointers
1500
x10591
2069B
Set of Strangers
greedy
,
matrices
1200
x14744
2069A
Was there an Array?
graph matchings
,
greedy
800
x22835
2068K
Amusement Park Rides
flows
,
graphs
x84
2068J
The Ultimate Wine Tasting Event
combinatorics
,
greedy
x747
2068I
Pinball
graphs
,
shortest paths
x21
2068H
Statues
constructive algorithms
,
greedy
,
math
x191
2068G
A Very Long Hike
shortest paths
x19
2068F
Mascot Naming
brute force
,
greedy
,
implementation
,
strings
x592
2068E
Porto Vs. Benfica
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
x162
2068D
Morse Code
dp
,
sortings
,
trees
x82
2068C
Ads
binary search
,
greedy
,
two pointers
x690
2068B
Urban Planning
constructive algorithms
x49
2068A
Condorcet Elections
constructive algorithms
,
graphs
,
greedy
,
probabilities
x481
2067C
Devyatkino
brute force
,
dfs and similar
,
greedy
,
math
1500
x9788
2067B
Two Large Bags
brute force
,
dp
,
greedy
,
sortings
1200
x14330
2067A
Adjacent Digit Sums
brute force
,
constructive algorithms
,
math
800
x21541
2066F
Curse
constructive algorithms
,
dp
,
math
3300
x40
2066E
Tropical Season
binary search
,
data structures
,
greedy
,
implementation
3300
x217
2066D2
Club of Young Aircraft Builders (hard version)
combinatorics
,
dp
,
math
2900
x391
2066D1
Club of Young Aircraft Builders (easy version)
combinatorics
,
dp
,
math
2400
x939
2066C
Bitwise Slides
bitmasks
,
combinatorics
,
dp
,
math
2300
x1676
2066B
White Magic
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x3732
2066A
Object Identification
graphs
,
greedy
,
implementation
,
interactive
1400
x5162
2065H
Bro Thinks He's Him
combinatorics
,
data structures
,
divide and conquer
,
dp
,
math
,
matrices
2200
x1262
2065G
Skibidus and Capping
combinatorics
,
math
,
number theory
1700
x3956
2065F
Skibidus and Slay
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1700
x4683
2065E
Skibidus and Rizz
constructive algorithms
,
greedy
,
strings
1600
x8352
2065D
Skibidus and Sigma
greedy
,
sortings
1200
x15245
2065C2
Skibidus and Fanum Tax (hard version)
binary search
,
greedy
1300
x13715
2065C1
Skibidus and Fanum Tax (easy version)
binary search
,
dp
,
greedy
1100
x21070
2065B
Skibidus and Ohio
strings
800
x31837
2065A
Skibidus and Amog'u
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
800
x41443
2064F
We Be Summing
binary search
,
data structures
,
dp
,
two pointers
2600
x435
2064E
Mycraft Sand Sort
combinatorics
,
data structures
,
dsu
,
greedy
,
math
,
sortings
2400
x983
2064D
Eating
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
greedy
,
trees
,
two pointers
1900
x4124
2064C
Remove the Ends
brute force
,
constructive algorithms
,
dp
,
greedy
1300
x13087
2064B
Variety is Discouraged
binary search
,
constructive algorithms
,
greedy
,
two pointers
1100
x16047
2064A
Brogramming Contest
greedy
,
strings
800
x23034
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