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Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
34:54:29
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data structures
combine-tags-by-or
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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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Problems
#
Name
679E
Bear and Bad Powers of 42
data structures
3100
x654
200A
Cinema
brute force
,
data structures
2400
x653
455E
Function
data structures
2900
x652
256E
Lucky Arrays
data structures
2400
x652
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x646
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x646
837G
Functions On The Segments
data structures
2500
x645
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x645
453E
Little Pony and Lord Tirek
data structures
3100
x644
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x642
946G
Almost Increasing Array
data structures
,
dp
2500
x641
295E
Yaroslav and Points
data structures
2500
x640
1117G
Recursive Queries
data structures
2500
x637
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x632
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x632
1774F2
Magician and Pigs (Hard Version)
binary search
,
brute force
,
data structures
,
implementation
2700
x631
319E
Ping-Pong
data structures
3000
x627
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x624
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x624
981G
Magic multisets
data structures
2500
x622
390C
Inna and Candy Boxes
data structures
x622
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x620
1486F
Pairs of Paths
combinatorics
,
data structures
,
dfs and similar
,
dp
,
trees
2600
x619
1621G
Weighted Increasing Subsequences
data structures
,
dp
,
math
3200
x617
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x614
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x609
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x609
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x608
1730E
Maximums and Minimums
combinatorics
,
data structures
,
divide and conquer
,
number theory
2700
x607
1611G
Robot and Candies
data structures
,
graph matchings
,
greedy
2500
x604
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x601
219E
Parking Lot
data structures
2200
x600
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x598
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x598
76F
Tourist
binary search
,
data structures
,
dp
2300
x598
1184C2
Heidi and the Turing Test (Medium)
data structures
2200
x595
870F
Paths
data structures
,
number theory
2700
x592
1951F
Inversion Composition
constructive algorithms
,
data structures
,
greedy
2500
x590
1819D
Misha and Apples
brute force
,
data structures
,
dp
,
two pointers
2800
x590
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x590
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x587
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x583
618E
Robot Arm
data structures
,
geometry
2500
x583
91E
Igloo Skyscraper
data structures
,
geometry
2500
x583
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x580
845E
Fire in the City
binary search
,
data structures
2400
x575
1625E2
Cats on the Upgrade (hard version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
2800
x574
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x574
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x574
1725K
Kingdom of Criticism
data structures
,
dsu
2500
x573
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x571
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x566
323C
Two permutations
data structures
2400
x565
144E
Competition
data structures
,
greedy
2200
x560
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x560
633H
Fibonacci-ish II
data structures
,
implementation
3100
x559
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x558
1582G
Kuzya and Homework
data structures
,
number theory
2600
x558
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x558
1707E
Replace
binary search
,
data structures
3500
x554
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x554
1270H
Number of Components
data structures
3300
x554
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x553
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x552
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x551
607D
Power Tree
data structures
,
trees
2600
x551
1000G
Two-Paths
data structures
,
dp
,
trees
2700
x549
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x547
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x539
1217F
Forced Online Queries Problem
data structures
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x537
173E
Camping Groups
data structures
,
sortings
2600
x532
1621F
Strange Instructions
data structures
,
greedy
,
implementation
2700
x530
1810F
M-tree
data structures
,
math
,
sortings
,
trees
2800
x527
1366G
Construct the String
data structures
,
dp
,
strings
2700
x527
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x522
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x520
542A
Place Your Ad Here
data structures
,
sortings
2400
x519
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x519
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x516
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x513
494D
Birthday
data structures
,
dfs and similar
,
dp
,
trees
2700
x511
480E
Parking Lot
data structures
,
divide and conquer
2800
x511
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x510
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x508
1316F
Battalion Strength
data structures
,
divide and conquer
,
probabilities
2800
x506
1290E
Cartesian Tree
data structures
3300
x506
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x506
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x505
1739F
Keyboard Design
bitmasks
,
data structures
,
dp
,
string suffix structures
,
strings
2600
x505
1423H
Virus
data structures
,
divide and conquer
,
dsu
,
graphs
2500
x505
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x505
1085G
Beautiful Matrix
combinatorics
,
data structures
,
dp
2900
x504
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x504
1677E
Tokitsukaze and Beautiful Subsegments
data structures
2900
x503
316E3
Summer Homework
data structures
,
math
2300
x503
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x502
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x500
1044F
DFS
data structures
2700
x498
187D
BRT Contract
data structures
2800
x498
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x492
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