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Before contest
Codeforces Round 943 (Div. 3)
18:36:49
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Difficulty:
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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
x2778
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2830
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2889
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3189
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3195
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3321
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3343
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3368
1567E
Non-Decreasing Dilemma
data structures
,
divide and conquer
,
math
2200
x3500
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3505
587C
Duff in the Army
data structures
,
trees
2200
x3676
903D
Almost Difference
data structures
,
math
2200
x3692
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x3870
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4483
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4619
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4972
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x5005
617E
XOR and Favorite Number
data structures
2200
x7769
52C
Circular RMQ
data structures
2200
x8146
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12497
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
x372
228D
Zigzag
data structures
2100
x374
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x694
35E
Parade
data structures
,
sortings
2100
x701
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x895
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
220C
Little Elephant and Shifts
data structures
2100
x921
1906F
Maximize The Value
data structures
,
sortings
2100
x925
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x932
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x938
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1028
1070E
Getting Deals Done
binary search
,
data structures
2100
x1189
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1228
1250C
Trip to Saint Petersburg
data structures
2100
x1286
1252G
Performance Review
data structures
2100
x1361
853C
Boredom
data structures
2100
x1387
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x1388
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1431
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1440
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1502
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1536
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1542
899F
Letters Removing
data structures
,
strings
2100
x1573
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1583
827C
DNA Evolution
data structures
,
strings
2100
x1612
909D
Colorful Points
data structures
,
greedy
,
implementation
2100
x1676
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1696
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1708
797D
Broken BST
data structures
,
dfs and similar
2100
x1748
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1782
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1810
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1935
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x1973
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x1980
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1984
1896E
Permutation Sorting
data structures
,
sortings
2100
x1998
601B
Lipshitz Sequence
data structures
,
math
2100
x2002
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2005
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2034
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2069
1108E2
Array and Segments (Hard version)
data structures
,
implementation
2100
x2117
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2135
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2158
1839D
Ball Sorting
data structures
,
dp
,
sortings
2100
x2170
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2193
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2234
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2241
1924B
Space Harbour
data structures
,
implementation
,
math
,
sortings
2100
x2262
1799D2
Hot Start Up (hard version)
data structures
,
dp
2100
x2264
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2265
1106E
Lunar New Year and Red Envelopes
data structures
,
dp
2100
x2314
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2331
1216F
Wi-Fi
data structures
,
dp
,
greedy
2100
x2331
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2331
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2350
1202C
You Are Given a WASD-string...
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
strings
2100
x2351
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2375
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2461
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2479
1767C
Count Binary Strings
data structures
,
dp
2100
x2497
1263E
Editor
data structures
,
implementation
2100
x2577
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x2592
1771D
Hossam and (sub-)palindromic tree
brute force
,
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2100
x2594
960F
Pathwalks
data structures
,
dp
,
graphs
2100
x2668
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x2685
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x2746
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2798
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2799
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2808
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2860
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x2869
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2911
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x2932
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2961
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x2971
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3031
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3035
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