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Codeforces Round 940 (Div. 2) and CodeCraft-23
3 days
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data structures
combine-tags-by-or
*combine tags by OR
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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Problems
#
Name
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2773
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2814
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2882
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3168
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3187
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3316
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3339
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3352
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3481
1567E
Non-Decreasing Dilemma
data structures
,
divide and conquer
,
math
2200
x3491
587C
Duff in the Army
data structures
,
trees
2200
x3663
903D
Almost Difference
data structures
,
math
2200
x3684
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x3863
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4456
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4602
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4954
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x4989
617E
XOR and Favorite Number
data structures
2200
x7710
52C
Circular RMQ
data structures
2200
x8047
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12418
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x103
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
926J
Segments
data structures
2100
x371
228D
Zigzag
data structures
2100
x373
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x436
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x692
35E
Parade
data structures
,
sortings
2100
x698
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x891
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
1906F
Maximize The Value
data structures
,
sortings
2100
x910
220C
Little Elephant and Shifts
data structures
2100
x918
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x930
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x931
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1023
1070E
Getting Deals Done
binary search
,
data structures
2100
x1189
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1221
1250C
Trip to Saint Petersburg
data structures
2100
x1282
1252G
Performance Review
data structures
2100
x1359
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x1386
853C
Boredom
data structures
2100
x1386
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1427
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1439
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1491
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1528
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1537
899F
Letters Removing
data structures
,
strings
2100
x1570
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1575
827C
DNA Evolution
data structures
,
strings
2100
x1608
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1670
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1692
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1707
797D
Broken BST
data structures
,
dfs and similar
2100
x1745
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1778
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1804
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1932
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x1959
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x1960
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1972
1896E
Permutation Sorting
data structures
,
sortings
2100
x1975
601B
Lipshitz Sequence
data structures
,
math
2100
x2000
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2001
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2022
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2067
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2108
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2126
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2129
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2159
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2184
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2224
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2226
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2234
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2247
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2253
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2274
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2310
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2311
1216F
Wi-Fi
data structures
,
dp
,
greedy
2100
x2321
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2322
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2343
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2345
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2385
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2454
1767C
Count Binary Strings
data structures
,
dp
2100
x2480
1263E
Editor
data structures
,
implementation
2100
x2546
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2579
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x2579
960F
Pathwalks
data structures
,
dp
,
graphs
2100
x2655
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x2656
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x2744
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2794
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2796
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2801
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x2843
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2845
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2909
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x2921
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2946
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x2969
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3019
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3027
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