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Codeforces Round (Div. 2)
5 days
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combine-tags-by-or
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2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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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Status
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Custom test
Problems
#
Name
2038N
Fixing the Expression
implementation
800
x11612
2038M
Royal Flush
dp
,
implementation
2800
x349
2038L
Bridge Renovation
brute force
,
dp
,
greedy
,
math
,
two pointers
1400
x8521
2038K
Grid Walk
brute force
,
dp
,
greedy
,
math
,
number theory
2100
x1877
2038J
Waiting for...
greedy
,
implementation
800
x9115
2038I
Polyathlon
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2500
x767
2038H
Galactic Council
flows
3000
x201
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x3136
2038F
Alternative Platforms
combinatorics
,
data structures
,
fft
,
math
,
sortings
2500
x502
2038E
Barrels
data structures
,
greedy
,
math
2900
x160
2038D
Divide OR Conquer
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
2400
x927
2038C
DIY
data structures
,
geometry
,
greedy
,
sortings
1400
x7364
2038B
Make It Equal
binary search
,
brute force
,
greedy
,
math
2100
x2021
2038A
Bonus Project
games
,
greedy
1400
x5758
2037G
Natlan Exploring
bitmasks
,
combinatorics
,
data structures
,
dp
,
math
,
number theory
2000
x3995
2037F
Ardent Flames
binary search
,
data structures
,
math
,
sortings
,
two pointers
2100
x3081
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x7723
2037D
Sharky Surfing
data structures
,
greedy
,
two pointers
1300
x15262
2037C
Superultra's Favorite Permutation
constructive algorithms
,
greedy
,
math
,
number theory
1000
x26388
2037B
Intercepted Inputs
brute force
,
implementation
800
x26000
2037A
Twice
implementation
800
x36812
2036G
Library of Magic
binary search
,
constructive algorithms
,
divide and conquer
,
interactive
,
math
,
number theory
2200
x1899
2036F
XORificator 3000
bitmasks
,
dp
,
number theory
,
two pointers
1900
x5664
2036E
Reverse the Rivers
binary search
,
constructive algorithms
,
data structures
,
greedy
1600
x9972
2036D
I Love 1543
brute force
,
implementation
,
matrices
1300
x16464
2036C
Anya and 1100
brute force
,
implementation
1100
x22758
2036B
Startup
greedy
,
sortings
800
x30306
2036A
Quintomania
implementation
800
x41758
2035H
Peak Productivity Forces
constructive algorithms
3500
x104
2035G2
Go Learn! (Hard Version)
divide and conquer
,
dp
3500
x118
2035G1
Go Learn! (Easy Version)
dp
,
trees
3300
x179
2035F
Tree Operations
binary search
,
brute force
,
dfs and similar
,
dp
,
trees
2500
x1140
2035E
Monster
binary search
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
ternary search
2300
x2021
2035D
Yet Another Real Number Problem
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
math
1800
x5999
2035C
Alya and Permutation
bitmasks
,
constructive algorithms
,
math
1400
x11933
2035B
Everyone Loves Tres
constructive algorithms
,
greedy
,
math
,
number theory
900
x21182
2035A
Sliding
implementation
,
math
800
x18133
2034H
Rayan vs. Rayaneh
brute force
,
dfs and similar
,
dp
,
number theory
3300
x207
2034G2
Simurgh's Watch (Hard Version)
greedy
,
implementation
3500
x89
2034G1
Simurgh's Watch (Easy Version)
constructive algorithms
,
greedy
,
implementation
,
sortings
3500
x89
2034F2
Khayyam's Royal Decree (Hard Version)
combinatorics
,
dp
,
math
,
sortings
2800
x624
2034F1
Khayyam's Royal Decree (Easy Version)
combinatorics
,
dp
,
math
,
sortings
2500
x925
2034E
Permutations Harmony
combinatorics
,
constructive algorithms
,
greedy
,
hashing
,
math
2200
x2107
2034D
Darius' Wisdom
constructive algorithms
,
greedy
,
implementation
,
sortings
1600
x6897
2034C
Trapped in the Witch's Labyrinth
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
1400
x9505
2034B
Rakhsh's Revival
data structures
,
greedy
,
implementation
,
two pointers
1000
x16385
2034A
King Keykhosrow's Mystery
brute force
,
chinese remainder theorem
,
math
,
number theory
800
x18779
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2106
2033F
Kosuke's Sloth
brute force
,
math
,
number theory
1800
x7433
2033E
Sakurako, Kosuke, and the Permutation
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
1400
x15012
2033D
Kousuke's Assignment
data structures
,
dp
,
dsu
,
greedy
,
math
1300
x18814
2033C
Sakurako's Field Trip
dp
,
greedy
,
two pointers
1400
x18554
2033B
Sakurako and Water
brute force
,
constructive algorithms
,
greedy
900
x29541
2033A
Sakurako and Kosuke
constructive algorithms
,
implementation
,
math
800
x42173
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x510
2032E
Balanced
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
2400
x1471
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x6421
2032C
Trinity
binary search
,
math
,
sortings
,
two pointers
1400
x16878
2032B
Medians
constructive algorithms
,
greedy
,
implementation
,
math
1100
x21294
2032A
Circuit
greedy
,
implementation
,
math
,
number theory
800
x25127
2031F
Penchick and Even Medians
binary search
,
constructive algorithms
,
interactive
,
probabilities
2800
x494
2031E
Penchick and Chloe's Trees
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
sortings
,
trees
2100
x2817
2031D
Penchick and Desert Rabbit
binary search
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
two pointers
1700
x10311
2031C
Penchick and BBQ Buns
constructive algorithms
,
math
,
number theory
1300
x16269
2031B
Penchick and Satay Sticks
brute force
,
greedy
,
sortings
900
x21453
2031A
Penchick and Modern Monument
constructive algorithms
,
dp
,
greedy
,
math
800
x21489
2030G2
The Destruction of the Universe (Hard Version)
combinatorics
,
math
3100
x279
2030G1
The Destruction of the Universe (Easy Version)
combinatorics
,
greedy
,
math
2900
x306
2030F
Orangutan Approved Subarrays
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2400
x1258
2030E
MEXimize the Score
combinatorics
,
data structures
,
dp
,
greedy
,
implementation
,
math
2200
x2065
2030D
QED's Favorite Permutation
data structures
,
implementation
,
sortings
1700
x9027
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x20404
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x24277
2030A
A Gift From Orangutan
constructive algorithms
,
greedy
,
math
,
sortings
800
x28054
2029I
Variance Challenge
flows
,
graphs
,
greedy
3400
x185
2029H
Message Spread
bitmasks
,
brute force
,
combinatorics
,
dp
3500
x120
2029G
Balanced Problem
data structures
,
dp
3000
x285
2029F
Palindrome Everywhere
constructive algorithms
,
graphs
,
greedy
2500
x882
2029E
Common Generator
brute force
,
constructive algorithms
,
math
,
number theory
2100
x3661
2029D
Cool Graph
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
1900
x4082
2029C
New Rating
binary search
,
data structures
,
dp
,
greedy
1700
x7991
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x12107
2029A
Set
greedy
,
math
800
x14415
2028F
Alice's Adventures in Addition
bitmasks
,
brute force
,
dp
,
implementation
2700
x574
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x2047
2028D
Alice's Adventures in Cards
constructive algorithms
,
data structures
,
dp
,
graphs
,
greedy
,
implementation
,
ternary search
2000
x3890
2028C
Alice's Adventures in Cutting Cake
binary search
,
dp
,
greedy
,
two pointers
1600
x10467
2028B
Alice's Adventures in Permuting
binary search
,
implementation
,
math
1400
x13800
2028A
Alice's Adventures in ''Chess''
brute force
,
implementation
,
math
900
x21010
2027E2
Bit Game (Hard Version)
bitmasks
,
dp
,
math
3100
x113
2027E1
Bit Game (Easy Version)
bitmasks
,
brute force
,
games
,
math
2800
x278
2027D2
The Endspeaker (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
2200
x1981
2027D1
The Endspeaker (Easy Version)
binary search
,
dp
,
graphs
,
greedy
,
implementation
,
two pointers
1700
x7266
2027C
Add Zeros
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
1500
x14406
2027B
Stalin Sort
brute force
,
greedy
1100
x18189
2027A
Rectangle Arrangement
geometry
,
implementation
,
math
800
x22409
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
2700
x434
2026E
Best Subsequence
bitmasks
,
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x2173
2026D
Sums of Segments
binary search
,
data structures
,
dp
,
implementation
,
math
1900
x6317
2026C
Action Figures
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x13144
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