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When submitting a solution in C++, please select either C++14 (GCC 6-32) or C++17 (GCC 7-32) as your compiler.
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Codeforces Round 935 (Div. 3)
03:44:25
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Difficulty:
—
greedy
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
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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Problems
#
Name
1948E
Clique Partition
constructive algorithms
,
graphs
,
greedy
,
implementation
x1785
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
x16013
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
x66
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
x149
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
x1085
1943A
MEX Game 1
games
,
greedy
x11519
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4193
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x26187
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x23066
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x11616
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x319
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x862
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x5853
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x275
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x930
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6156
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1018
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x2707
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5448
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x14963
1934A
Too Min Too Max
greedy
,
math
800
x21380
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x16153
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x33228
1932D
Card Game
greedy
,
implementation
1400
x8731
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x24720
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x12257
1931C
Make Equal Again
brute force
,
greedy
,
math
1000
x24447
1931B
Make Equal
greedy
800
x28719
1930D2
Sum over all Substrings (Hard Version)
bitmasks
,
divide and conquer
,
dp
,
dsu
,
greedy
,
implementation
,
strings
2100
x2192
1930D1
Sum over all Substrings (Easy Version)
brute force
,
dp
,
greedy
,
strings
1800
x3390
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x5941
1930A
Maximise The Score
greedy
,
sortings
800
x15962
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1359
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12397
1929B
Sasha and the Drawing
constructive algorithms
,
greedy
,
math
800
x22850
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x27604
1928E
Modular Sequence
brute force
,
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
,
number theory
2300
x1388
1928D
Lonely Mountain Dungeons
brute force
,
data structures
,
greedy
,
math
,
ternary search
1900
x3451
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14198
1927G
Paint Charges
data structures
,
dp
,
greedy
,
math
2300
x1382
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3468
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17113
1927C
Choose the Different Ones!
brute force
,
greedy
,
math
1000
x24376
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x29022
1927A
Make it White
greedy
,
strings
800
x38103
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2548
1926D
Vlad and Division
bitmasks
,
greedy
1300
x12160
1925B
A Balanced Problemset?
brute force
,
greedy
,
math
,
number theory
1200
x17448
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x26405
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11672
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x284
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5263
1923C
Find B
constructive algorithms
,
greedy
1400
x11828
1923B
Monsters Attack!
dp
,
greedy
,
implementation
1100
x15050
1923A
Moving Chips
greedy
,
implementation
800
x22083
1922E
Increasing Subsequences
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
math
1800
x6713
1922C
Closest Cities
greedy
,
implementation
,
math
1300
x16193
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8480
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19267
1921C
Sending Messages
greedy
,
math
900
x26328
1921B
Arranging Cats
greedy
,
implementation
800
x31150
1921A
Square
greedy
,
math
800
x38524
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x18604
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x25784
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x699
1919F1
Wine Factory (Easy Version)
data structures
,
greedy
2300
x1942
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3477
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16077
1919B
Plus-Minus Split
greedy
800
x28280
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x687
1918C
XOR-distance
bitmasks
,
greedy
,
implementation
,
math
1400
x11906
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21292
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x27942
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x8974
1916F
Group Division
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2900
x376
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2024
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16172
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5078
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x17287
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x26327
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x3484
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x10725
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x10667
1914D
Three Activities
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x16849
1914C
Quests
greedy
,
math
1100
x19586
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x12959
1910G
Pool Records
*special problem
,
greedy
2700
x48
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x151
1910D
Remove and Add
*special problem
,
greedy
1800
x280
1910B
Security Guard
*special problem
,
greedy
1600
x556
1909D
Split Plus K
greedy
,
math
,
number theory
1900
x3697
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9493
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1675
1907F
Shift and Reverse
greedy
,
sortings
1800
x4177
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x17709
1906M
Triangle Construction
greedy
,
math
1700
x2133
1905C
Largest Subsequence
greedy
,
strings
1400
x10499
1905B
Begginer's Zelda
greedy
,
trees
1100
x14748
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3557
1904D1
Set To Max (Easy Version)
brute force
,
constructive algorithms
,
greedy
1600
x5295
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