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Problems
#
Name
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x309
1556G
Gates to Another World
bitmasks
,
data structures
,
dsu
,
two pointers
3300
x309
1237H
Balanced Reversals
constructive algorithms
3300
x303
1396D
Rainbow Rectangles
data structures
,
sortings
,
two pointers
3300
x297
1322E
Median Mountain Range
data structures
3300
x295
1172E
Nauuo and ODT
data structures
3300
x290
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x288
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x283
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x281
1528F
AmShZ Farm
combinatorics
,
fft
,
math
3300
x275
704E
Iron Man
data structures
,
geometry
,
trees
3300
x272
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x265
1083F
The Fair Nut and Amusing Xor
data structures
3300
x265
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x261
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x261
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x260
1427G
One Billion Shades of Grey
flows
,
graphs
3300
x258
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x252
607E
Cross Sum
binary search
,
geometry
3300
x248
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x238
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x237
1738H
Palindrome Addicts
data structures
,
strings
3300
x228
1750G
Doping
combinatorics
,
dp
,
math
3300
x225
1188E
Problem from Red Panda
combinatorics
3300
x224
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x220
1500E
Subset Trick
binary search
,
data structures
3300
x212
1060H
Sophisticated Device
constructive algorithms
3300
x210
1641E
Special Positions
combinatorics
,
divide and conquer
,
fft
,
math
3300
x203
1392I
Kevin and Grid
fft
,
graphs
,
math
3300
x203
1870G
MEXanization
data structures
3300
x202
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x201
1740H
MEX Tree Manipulation
data structures
,
trees
3300
x201
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x199
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x172
1804H
Code Lock
bitmasks
,
dp
3300
x169
1450H2
Multithreading (Hard Version)
combinatorics
,
implementation
,
math
3300
x165
1284G
Seollal
graphs
3300
x165
725G
Messages on a Tree
3300
x161
1886F
Diamond Theft
data structures
,
greedy
3300
x159
1615G
Maximum Adjacent Pairs
constructive algorithms
,
graph matchings
3300
x147
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x146
1718F
Burenka, an Array and Queries
data structures
,
math
,
number theory
3300
x145
1017H
The Films
brute force
3300
x138
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x137
1530G
What a Reversal
constructive algorithms
3300
x133
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x133
1580F
Problems for Codeforces
combinatorics
,
fft
,
math
3300
x130
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x123
868G
El Toll Caves
math
3300
x119
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x119
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x119
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x119
1737F
Ela and Prime GCD
constructive algorithms
,
math
,
number theory
3300
x117
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x117
1266G
Permutation Concatenation
string suffix structures
3300
x117
1381E
Origami
geometry
,
math
,
sortings
3300
x100
1666A
Admissible Map
3300
x99
901E
Cyclic Cipher
fft
,
math
3300
x84
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
3300
x81
1938D
Bánh Bò
3300
x78
771F
Bear and Isomorphic Points
geometry
,
two pointers
3300
x78
1965F
Conference
data structures
,
flows
3300
x75
737F
Dirty plates
constructive algorithms
,
math
3300
x69
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x68
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x67
1578I
Interactive Rays
geometry
,
interactive
3300
x58
949F
Astronomy
geometry
,
probabilities
3300
x57
1912I
Innovative Washing Machine
geometry
,
math
,
two pointers
3300
x54
1666B
Budget Distribution
3300
x53
1912C
Cactus Transformation
constructive algorithms
3300
x45
1491H
Yuezheng Ling and Dynamic Tree
data structures
,
trees
3400
x764
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x757
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x660
1630F
Making It Bipartite
flows
,
graph matchings
,
graphs
,
number theory
3400
x508
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x480
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x465
1137F
Matches Are Not a Child's Play
data structures
,
trees
3400
x460
1482H
Exam
data structures
,
string suffix structures
,
trees
3400
x433
1710D
Recover the Tree
constructive algorithms
,
trees
3400
x408
1693E
Outermost Maximums
data structures
,
greedy
3400
x371
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x363
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x358
1801G
A task for substrings
data structures
,
string suffix structures
,
strings
3400
x350
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x344
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x339
1276F
Asterisk Substrings
string suffix structures
3400
x333
794G
Replace All
combinatorics
,
dp
,
math
3400
x323
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x275
1039E
Summer Oenothera Exhibition
data structures
3400
x265
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x250
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x245
1572F
Stations
data structures
3400
x240
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x235
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x233
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x230
1515I
Phoenix and Diamonds
binary search
,
data structures
,
sortings
3400
x225
1268E
Happy Cactus
dp
3400
x224
1103E
Radix sum
fft
,
math
,
number theory
3400
x220
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x212
1010F
Tree
fft
,
graphs
,
trees
3400
x211
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binary search
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data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
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number theory
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sortings
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strings
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