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ICPC Challenge
Please subscribe to the official Codeforces channel in Telegram via the link
https://t.me/codeforces_official
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Codeforces Round 912 (Div. 2)
27:48:44
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Difficulty:
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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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Main
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Problems
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Status
Standings
Custom test
Problems
#
Name
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x58
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x804
1901D
Yet Another Monster Fight
binary search
,
dp
,
greedy
,
implementation
,
math
1700
x3767
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x6808
1901B
Chip and Ribbon
greedy
,
math
1100
x9755
1901A
Line Trip
greedy
,
math
800
x14650
1900F
Local Deletions
binary search
,
data structures
,
implementation
x80
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
x987
1900D
Small GCD
bitmasks
,
brute force
,
dp
,
math
,
number theory
x2150
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
shortest paths
,
trees
x6579
1900B
Laura and Operations
dp
,
math
x10222
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
x12095
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2090
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x4629
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x9690
1899D
Yarik and Musical Notes
hashing
,
math
,
number theory
1300
x8778
1899C
Yarik and Array
dp
,
greedy
,
two pointers
1100
x12554
1899B
250 Thousand Tons of TNT
brute force
,
implementation
,
number theory
1100
x13237
1899A
Game with Integers
games
,
math
,
number theory
800
x24944
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x506
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x1486
1898D
Absolute Beauty
greedy
,
math
1900
x3378
1898C
Colorful Grid
constructive algorithms
1700
x3440
1898B
Milena and Admirer
greedy
,
math
1500
x7018
1898A
Milica and String
brute force
,
implementation
,
strings
800
x11420
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
x27
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
x29
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
x106
1896F
Bracket Xoring
bitmasks
,
constructive algorithms
,
graph matchings
,
implementation
x385
1896E
Permutation Sorting
data structures
,
sortings
x1303
1896D
Ones and Twos
binary search
,
data structures
,
divide and conquer
,
math
,
two pointers
x3284
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
x5446
1896B
AB Flipping
greedy
,
strings
,
two pointers
x8901
1896A
Jagged Swaps
sortings
x10573
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x115
1895F
Fancy Arrays
combinatorics
,
dp
,
math
,
matrices
2600
x472
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1201
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x4563
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x8229
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x17413
1895A
Treasure Chest
math
800
x20346
1894B
Two Out of Three
constructive algorithms
1000
x11498
1894A
Secret Sport
implementation
,
strings
800
x15266
1893E
Cacti Symphony
combinatorics
,
dfs and similar
,
dp
,
graphs
3500
x99
1893D
Colorful Constructive
constructive algorithms
,
data structures
,
greedy
2600
x665
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x1929
1893B
Neutral Tonality
constructive algorithms
,
greedy
,
sortings
,
two pointers
1700
x6506
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8821
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x2766
1891E
Brukhovich and Exams
brute force
,
greedy
,
implementation
,
math
,
sortings
2500
x621
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3160
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x8593
1891B
Deja Vu
brute force
,
math
,
sortings
1100
x12560
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x16306
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x14646
1890A
Doremy's Paint 3
constructive algorithms
800
x15754
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x42
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x34
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x385
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x694
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2501
1889B
Doremy's Connecting Plan
constructive algorithms
,
greedy
,
math
,
sortings
1700
x5596
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x9906
1887F
Minimum Segments
constructive algorithms
3400
x85
1887E
Good Colorings
binary search
,
constructive algorithms
,
graphs
,
interactive
3100
x187
1887D
Split
binary search
,
data structures
,
divide and conquer
,
dsu
,
math
,
trees
,
two pointers
2700
x628
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1241
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2094
1886F
Diamond Theft
data structures
,
greedy
3300
x136
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1140
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x2919
1886C
Decreasing String
implementation
,
strings
1600
x8419
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x13030
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x21859
1884E
Hard Design
greedy
,
implementation
,
math
2800
x195
1884D
Counting Rhyme
dp
,
math
,
number theory
2100
x2210
1884C
Medium Design
brute force
,
data structures
,
dp
,
greedy
,
sortings
1700
x4338
1884B
Haunted House
binary search
,
greedy
,
math
,
two pointers
1100
x9538
1884A
Simple Design
brute force
,
greedy
,
math
800
x14217
1883G2
Dances (Hard Version)
binary search
,
greedy
,
sortings
,
two pointers
1900
x3918
1883G1
Dances (Easy version)
binary search
,
greedy
,
two pointers
1400
x6664
1883F
You Are So Beautiful
data structures
1400
x5977
1883E
Look Back
bitmasks
,
greedy
1700
x5353
1883D
In Love
data structures
,
greedy
1500
x7394
1883C
Raspberries
dp
,
math
1000
x16462
1883B
Chemistry
strings
900
x19589
1883A
Morning
math
800
x19843
1882E2
Two Permutations (Hard Version)
constructive algorithms
3100
x227
1882E1
Two Permutations (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
number theory
2400
x827
1882D
Tree XOR
bitmasks
,
dfs and similar
,
dp
,
greedy
,
trees
1900
x4210
1882C
Card Game
brute force
,
greedy
1500
x9550
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x12452
1882A
Increasing Sequence
greedy
800
x22307
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x1810
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x4673
1881E
Block Sequence
dp
1500
x8918
1881D
Divide and Equalize
math
,
number theory
1300
x11073
1881C
Perfect Square
brute force
,
implementation
1200
x13125
1881B
Three Threadlets
math
900
x20155
1881A
Don't Try to Count
brute force
,
strings
800
x22015
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