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Codeforces Round 937 (Div. 4)
01:16:27
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binary search
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
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strings
ternary search
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Name
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1205
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x7135
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x481
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x5681
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x148
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x259
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x4628
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x7279
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x55
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x356
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2169
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x312
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x6712
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x6509
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5643
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x8935
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6087
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x12640
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x14532
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17422
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9186
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x293
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5441
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x381
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x845
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x4914
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4048
1915C
Can I Square?
binary search
,
implementation
800
x36083
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x266
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13117
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x75
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11411
1906D
Spaceship Exploration
binary search
,
geometry
2800
x81
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x9978
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12190
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x518
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x4870
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3516
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x12996
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x138
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x5905
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x248
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x4965
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8289
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x166
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1420
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3625
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10797
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x325
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x783
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1528
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2584
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x14851
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11394
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4725
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x8695
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2093
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1059
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10579
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x109
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x68
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13437
1873E
Building an Aquarium
binary search
,
sortings
1100
x22056
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11491
1870F
Lazy Numbers
binary search
,
math
2900
x459
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10519
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x644
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
x1463
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x109
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2568
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5493
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x15693
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19326
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x141
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x15743
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6406
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10141
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10715
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x499
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16251
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7391
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2830
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20190
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x613
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1464
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9606
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1417
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2467
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x12945
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x841
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x6441
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7138
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13073
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x364
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10653
1840D
Wooden Toy Festival
binary search
,
greedy
,
sortings
1400
x12530
1838F
Stuck Conveyor
binary search
,
constructive algorithms
,
interactive
3000
x287
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2032
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x881
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