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Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
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combine-tags-by-or
*combine tags by OR
2-sat
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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
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probabilities
schedules
shortest paths
sortings
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strings
ternary search
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two pointers
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#
Name
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x15832
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1329
1952G
Mathematician Takeover
binary search
,
dfs and similar
,
math
x870
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x30
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x160
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x10885
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1494
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8581
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x581
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6574
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x185
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x314
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2277
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4998
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x7848
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x62
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x394
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2333
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x358
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x7116
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6932
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5892
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9410
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6278
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12981
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14943
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17901
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9655
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x312
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5709
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x389
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x862
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5020
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4180
1915C
Can I Square?
binary search
,
implementation
800
x36869
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x283
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13433
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11734
1906D
Spaceship Exploration
binary search
,
geometry
2800
x85
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10349
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12588
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x547
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x4986
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3604
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13177
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x141
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6053
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x252
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5107
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8507
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x167
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1438
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3676
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11079
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x327
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x794
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1551
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2637
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15019
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11549
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4809
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x8977
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2136
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1079
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10837
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x114
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x99
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13618
1873E
Building an Aquarium
binary search
,
sortings
1100
x22484
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11723
1870F
Lazy Numbers
binary search
,
math
2900
x460
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10652
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x647
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x402
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1491
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x111
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2613
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5580
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x15874
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19488
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x144
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x15900
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6475
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10292
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10908
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x517
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16398
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7492
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2887
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20541
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x619
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1485
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9737
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1433
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2498
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13216
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x845
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6527
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7249
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