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Problems
#
Name
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1045
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1912
1795D
Triangle Coloring
combinatorics
,
math
1600
x8433
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11362
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21135
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23222
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1004
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3337
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12411
1794B
Not Dividing
constructive algorithms
,
greedy
,
math
900
x19374
1794A
Prefix and Suffix Array
strings
800
x16534
1793F
Rebrending
brute force
,
data structures
,
divide and conquer
,
implementation
2600
x1272
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x924
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5741
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x18049
1793B
Fedya and Array
constructive algorithms
,
math
1100
x15201
1793A
Yet Another Promotion
greedy
,
math
800
x17697
1792F2
Graph Coloring (hard version)
brute force
,
combinatorics
,
divide and conquer
,
dp
,
fft
,
graphs
2900
x373
1792F1
Graph Coloring (easy version)
combinatorics
,
dp
,
graphs
2700
x665
1792E
Divisors and Table
brute force
,
dfs and similar
,
dp
,
number theory
2400
x1301
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5865
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13160
1792B
Stand-up Comedian
greedy
,
math
1200
x20149
1792A
GamingForces
greedy
,
sortings
800
x27100
1791G2
Teleporters (Hard Version)
binary search
,
greedy
,
sortings
1900
x4453
1791G1
Teleporters (Easy Version)
greedy
,
sortings
1100
x20418
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x11442
1791E
Negatives and Positives
dp
,
greedy
,
sortings
1100
x25459
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26767
1791C
Prepend and Append
implementation
,
two pointers
800
x40340
1791B
Following Directions
geometry
,
implementation
800
x41665
1791A
Codeforces Checking
implementation
,
strings
800
x54654
1790G
Tokens on Graph
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2300
x1041
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3141
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x14129
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x18094
1790C
Premutation
brute force
,
implementation
,
math
1000
x22896
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26628
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35566
1789F
Serval and Brain Power
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
strings
2700
x511
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x757
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1565
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8040
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15752
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x16884
1788F
XOR, Tree, and Queries
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
trees
2500
x785
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2464
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3719
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x16427
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19215
1788A
One and Two
brute force
,
implementation
,
math
800
x27440
1787I
Treasure Hunt
data structures
,
divide and conquer
,
two pointers
3400
x148
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x197
1787G
Colorful Tree Again
brute force
,
data structures
,
trees
3000
x395
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x628
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2172
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3256
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6687
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12670
1787A
Exponential Equation
constructive algorithms
,
math
800
x18681
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8598
1786A2
Alternating Deck (hard version)
implementation
800
x11210
1786A1
Non-alternating Deck (easy version)
implementation
800
x13597
1784F
Minimums or Medians
3400
x169
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x300
1784D
Wooden Spoon
combinatorics
,
dp
2400
x949
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1523
1784B
Letter Exchange
constructive algorithms
1900
x3205
1784A
Monsters (easy version)
brute force
,
greedy
1000
x14445
1783G
Weighed Tree Radius
data structures
,
divide and conquer
,
implementation
,
trees
2800
x406
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x907
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2018
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4164
1783C
Yet Another Tournament
binary search
,
greedy
,
sortings
1700
x8784
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17147
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x27144
1781H2
Window Signals (hard version)
3500
x86
1781H1
Window Signals (easy version)
3200
x112
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x213
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x729
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1261
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5224
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7023
1781B
Going to the Cinema
brute force
,
greedy
,
sortings
1000
x13207
1781A
Parallel Projection
geometry
,
math
800
x14844
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x666
1780F
Three Chairs
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
number theory
,
sortings
2300
x1368
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1300
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4634
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16508
1780A
Hayato and School
constructive algorithms
,
greedy
800
x21055
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x131
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x301
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1215
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
x7475
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11777
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x22970
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22877
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x596
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