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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 936 (Div. 2)
2 days
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combine-tags-by-or
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2-sat
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bitmasks
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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
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probabilities
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Name
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
x91
1945E
Binary Search
binary search
,
constructive algorithms
x2101
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
x76
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
x157
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4219
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x6701
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x43
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x320
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2017
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x276
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x6407
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6169
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5455
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x8608
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x5949
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12405
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14207
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17125
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x8722
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
x5269
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x370
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x831
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x4848
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x3999
1915C
Can I Square?
binary search
,
implementation
800
x35502
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x264
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x12962
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x75
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11234
1906D
Spaceship Exploration
binary search
,
geometry
2800
x76
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x9735
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x11938
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x514
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x4812
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3483
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x12859
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x137
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x5820
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x224
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x4882
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8168
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x162
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1411
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3602
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10645
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x320
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x780
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1513
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2553
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x14769
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11301
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4678
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x8530
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2073
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1053
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10442
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x106
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x66
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13291
1873E
Building an Aquarium
binary search
,
sortings
1100
x21718
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11379
1870F
Lazy Numbers
binary search
,
math
2900
x453
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10457
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x643
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x399
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1457
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x108
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2560
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5463
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x15596
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19232
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x140
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x15633
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6366
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10053
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10620
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x496
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16144
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7337
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2806
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x19919
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x609
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1449
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9533
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1405
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2452
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x12782
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x835
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6389
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7094
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x12985
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x361
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10553
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x12468
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x285
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2023
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x873
1834E
MEX of LCM
binary search
,
data structures
,
implementation
,
math
,
number theory
2300
x1977
1832F
Zombies
binary search
,
dp
3200
x245
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