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Codeforces Round 941 (Div. 1)
01:36:06
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1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
x214
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
x268
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17849
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1587
1952G
Mathematician Takeover
binary search
,
dfs and similar
,
math
x897
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x38
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x179
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11448
1949B
Charming Meals
binary search
,
brute force
,
greedy
,
sortings
x1531
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8824
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x606
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6743
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x209
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x333
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2358
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5087
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8002
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x64
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x403
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2372
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x384
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x7228
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7034
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5959
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9542
1930C
Lexicographically Largest
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
1700
x6328
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13083
1928B
Equalize
binary search
,
greedy
,
sortings
,
two pointers
1200
x15082
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x18063
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9816
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x320
1923D
Slimes
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
1800
x5790
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x394
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x867
1920D
Array Repetition
binary search
,
brute force
,
dsu
,
implementation
,
math
1900
x5056
1918D
Blocking Elements
binary search
,
data structures
,
dp
,
implementation
,
two pointers
1900
x4211
1915C
Can I Square?
binary search
,
implementation
800
x37115
1913F
Palindromic Problem
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2800
x286
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13531
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11845
1906D
Spaceship Exploration
binary search
,
geometry
2800
x88
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10479
1904B
Collecting Game
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1100
x12711
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x550
1903D1
Maximum And Queries (easy version)
binary search
,
bitmasks
,
brute force
,
greedy
1700
x5022
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3636
1902B
Getting Points
binary search
,
brute force
,
greedy
1100
x13246
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x143
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x6093
1900F
Local Deletions
binary search
,
data structures
,
implementation
2800
x254
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
1700
x5140
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8551
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x168
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1449
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3685
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x11175
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x329
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x802
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1560
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2658
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15082
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x11616
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x4843
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x9079
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2147
1878G
wxhtzdy ORO Tree
binary search
,
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
implementation
,
trees
2300
x1088
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10926
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x116
1876F
Indefinite Clownfish
binary search
,
graphs
3500
x104
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13699
1873E
Building an Aquarium
binary search
,
sortings
1100
x22675
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11809
1870F
Lazy Numbers
binary search
,
math
2900
x462
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10683
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x651
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x404
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1498
1866F
Freak Joker Process
binary search
,
data structures
,
sortings
3100
x113
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2634
1862F
Magic Will Save the World
binary search
,
bitmasks
,
brute force
,
dp
1800
x5621
1862D
Ice Cream Balls
binary search
,
combinatorics
,
constructive algorithms
,
math
1300
x15936
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19564
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x146
1860B
Fancy Coins
binary search
,
brute force
,
greedy
,
math
1200
x15950
1859D
Andrey and Escape from Capygrad
binary search
,
data structures
,
dp
,
dsu
,
greedy
,
sortings
1800
x6512
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10343
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10973
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x522
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x16474
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x7533
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2903
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20672
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x646
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1491
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9775
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1443
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2507
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13288
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x850
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