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Problems
#
Name
1806D
DSU Master
combinatorics
,
dp
,
dsu
,
math
2500
x851
1806C
Sequence Master
brute force
,
constructive algorithms
,
math
1600
x7220
1806A
Walking Master
geometry
,
greedy
,
math
800
x22389
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x329
1805F1
Survival of the Weakest (easy version)
binary search
,
brute force
,
implementation
,
math
,
sortings
2600
x823
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x12048
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11556
1804A
Lame King
greedy
,
math
800
x17696
1802B
Settlement of Guinea Pigs
greedy
,
implementation
,
math
1000
x12922
1801F
Another n-dimensional chocolate bar
dp
,
math
,
meet-in-the-middle
,
number theory
2700
x546
1799G
Count Voting
combinatorics
,
dp
,
math
2600
x702
1799E
City Union
constructive algorithms
,
dfs and similar
,
dsu
,
geometry
,
greedy
,
implementation
,
math
2300
x1156
1799B
Equalize by Divide
brute force
,
constructive algorithms
,
greedy
,
math
1200
x10837
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11367
1798F
Gifts from Grandfather Ahmed
dp
,
math
,
number theory
2500
x467
1798D
Shocking Arrangement
constructive algorithms
,
greedy
,
math
1600
x9098
1798C
Candy Store
greedy
,
math
,
number theory
1700
x7816
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1197
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x169
1796C
Maximum Set
binary search
,
math
1600
x9812
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1922
1795D
Triangle Coloring
combinatorics
,
math
1600
x8501
1794D
Counting Factorizations
combinatorics
,
divide and conquer
,
dp
,
math
,
number theory
1900
x3360
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12526
1794B
Not Dividing
constructive algorithms
,
greedy
,
math
900
x19621
1793D
Moscow Gorillas
binary search
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1800
x5779
1793B
Fedya and Array
constructive algorithms
,
math
1100
x15249
1793A
Yet Another Promotion
greedy
,
math
800
x17728
1792D
Fixed Prefix Permutations
binary search
,
bitmasks
,
data structures
,
hashing
,
math
,
sortings
1700
x5907
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x13298
1792B
Stand-up Comedian
greedy
,
math
1200
x20255
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3156
1790C
Premutation
brute force
,
implementation
,
math
1000
x22987
1790B
Taisia and Dice
greedy
,
greedy
,
math
800
x26696
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35696
1789E
Serval and Music Game
brute force
,
dp
,
implementation
,
math
,
number theory
2500
x766
1789C
Serval and Toxel's Arrays
combinatorics
,
dp
,
implementation
,
math
1500
x8107
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x17117
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3734
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x16505
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19292
1788A
One and Two
brute force
,
implementation
,
math
800
x27737
1787F
Inverse Transformation
constructive algorithms
,
implementation
,
math
2500
x632
1787E
The Harmonization of XOR
bitmasks
,
constructive algorithms
,
greedy
,
math
2100
x2185
1787C
Remove the Bracket
dp
,
greedy
,
math
1600
x6734
1787B
Number Factorization
greedy
,
math
,
number theory
1100
x12727
1787A
Exponential Equation
constructive algorithms
,
math
800
x18760
1783E
Game of the Year
brute force
,
data structures
,
math
,
number theory
2300
x2034
1783B
Matrix of Differences
constructive algorithms
,
math
1100
x17192
1783A
Make it Beautiful
constructive algorithms
,
math
,
sortings
800
x27402
1781F
Bracket Insertion
combinatorics
,
dp
,
math
,
trees
2700
x737
1781D
Many Perfect Squares
brute force
,
math
,
number theory
1800
x5264
1781A
Parallel Projection
geometry
,
math
800
x14862
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x671
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1308
1780B
GCD Partition
brute force
,
greedy
,
math
,
number theory
1100
x16636
1779B
MKnez's ConstructiveForces Task
constructive algorithms
,
math
900
x23041
1778F
Maximizing Root
dfs and similar
,
dp
,
graphs
,
math
,
number theory
,
trees
2600
x599
1778E
The Tree Has Fallen!
bitmasks
,
dfs and similar
,
math
,
trees
2500
x823
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2565
1778B
The Forbidden Permutation
greedy
,
math
1300
x12920
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3228
1777C
Quiz Master
binary search
,
math
,
number theory
,
sortings
,
two pointers
1700
x7858
1777B
Emordnilap
combinatorics
,
greedy
,
math
900
x16612
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x21387
1776N
Count Permutations
math
3500
x71
1776L
Controllers
binary search
,
math
1500
x5245
1776K
Uniform Chemistry
dp
,
math
3200
x64
1776G
Another Wine Tasting Event
combinatorics
,
constructive algorithms
,
math
,
strings
2100
x1955
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x339
1775F
Laboratory on Pluto
constructive algorithms
,
dp
,
greedy
,
math
2500
x742
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5795
1775C
Interesting Sequence
bitmasks
,
math
1600
x9698
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x11617
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x21961
1773J
Jumbled Trees
constructive algorithms
,
math
2900
x102
1773G
Game of Questions
bitmasks
,
combinatorics
,
dp
,
fft
,
math
,
probabilities
2800
x321
1773A
Amazing Trick
constructive algorithms
,
graph matchings
,
math
,
probabilities
1900
x1482
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1274
1772D
Absolute Sorting
constructive algorithms
,
math
1400
x14980
1772C
Different Differences
constructive algorithms
,
greedy
,
math
1000
x22727
1771C
Hossam and Trainees
greedy
,
math
,
number theory
1600
x9053
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x22084
1770G
Koxia and Bracket
divide and conquer
,
fft
,
math
3400
x152
1770F
Koxia and Sequence
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
3100
x618
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1299
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8289
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x857
1769B1
Копирование файлов I
*special problem
,
brute force
,
implementation
,
math
1000
x1315
1769A
Узкая дорога
*special problem
,
math
800
x1903
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1788
1768B
Quick Sort
greedy
,
math
900
x22065
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x28054
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x843
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9450
1766D
Lucky Chains
math
,
number theory
1600
x8418
1765M
Minimum LCM
math
,
number theory
1000
x12777
1765K
Torus Path
greedy
,
math
1500
x5392
1765J
Hero to Zero
graph matchings
,
math
2900
x187
1765E
Exchange
brute force
,
math
1000
x9556
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