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Problems
#
Name
1791A
Codeforces Checking
implementation
,
strings
800
x54187
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2300
x1036
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3108
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x14084
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x17968
1790C
Premutation
brute force
,
implementation
,
math
1000
x22826
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26558
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35449
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x508
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x753
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1555
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x7998
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15720
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16751
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x775
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2444
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3688
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x16357
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19143
1788A
One and Two
brute force
,
implementation
,
math
800
x27185
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x146
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x195
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x391
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x624
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2161
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3239
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6652
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12635
1787A
Exponential Equation
constructive algorithms
,
math
800
x18655
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8569
1786A2
Alternating Deck (hard version)
implementation
800
x11185
1786A1
Non-alternating Deck (easy version)
implementation
800
x13563
1784F
Minimums or Medians
3400
x168
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x297
1784D
Wooden Spoon
combinatorics
,
dp
2400
x942
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1511
1784B
Letter Exchange
constructive algorithms
1900
x3198
1784A
Monsters (easy version)
brute force
,
greedy
1000
x14398
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x402
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x887
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2008
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4142
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x8725
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17098
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x26960
1781H2
Window Signals (hard version)
3500
x86
1781H1
Window Signals (easy version)
3200
x111
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x212
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x727
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1258
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5210
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x6978
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13179
1781A
Parallel Projection
geometry
,
math
800
x14827
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x661
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1360
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1293
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4623
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16416
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21027
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x129
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x299
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1212
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1684
1779D
Boris and His Amazing Haircut
constructive algorithms
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1700
x7434
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11724
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x22935
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22859
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x594
1778E
The Tree Has Fallen!
bitmasks
,
dfs and similar
,
math
,
trees
2500
x789
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2521
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x7590
1778B
The Forbidden Permutation
greedy
,
math
1300
x12848
1778A
Flip Flop Sum
greedy
,
implementation
800
x23688
1777F
Comfortably Numb
bitmasks
,
data structures
,
divide and conquer
,
strings
,
trees
2400
x806
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1676
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3185
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7642
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x16536
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x20942
1776N
Count Permutations
math
3500
x62
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x337
1776L
Controllers
binary search
,
math
1500
x5086
1776K
Uniform Chemistry
dp
,
math
3200
x63
1776J
Italian Data Centers
graphs
,
shortest paths
2500
x603
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x633
1776H
Beppa and SwerChat
two pointers
1300
x5971
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1936
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3193
1776E
Crossing the Railways
data structures
,
dp
3500
x60
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x332
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x749
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1234
1776A
Walking Boy
greedy
800
x6726
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x729
1775E
The Human Equation
greedy
,
implementation
2100
x3002
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5718
1775C
Interesting Sequence
bitmasks
,
math
1600
x9537
1775B
Gardener and the Array
bitmasks
,
constructive algorithms
1300
x12287
1775A2
Gardener and the Capybaras (hard version)
constructive algorithms
,
greedy
900
x18229
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data structures
dfs and similar
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dp
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geometry
graph matchings
graphs
greedy
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implementation
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number theory
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sortings
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