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Codeforces Round 952 (Div. 4)
41:09:28
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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
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x395
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x781
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1961
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x15185
633H
Fibonacci-ish II
data structures
,
implementation
3100
x578
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x756
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x572
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2686
631E
Product Sum
data structures
,
dp
,
geometry
2600
x2241
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2004
631C
Report
data structures
,
sortings
1700
x3756
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x974
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3910
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x835
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1152
627B
Factory Repairs
data structures
1700
x2671
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x520
625E
Frog Fights
data structures
,
greedy
2800
x324
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6236
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x706
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5290
618E
Robot Arm
data structures
,
geometry
2500
x587
617E
XOR and Favorite Number
data structures
2200
x7926
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x8876
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x7775
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x856
610E
Alphabet Permutations
data structures
,
strings
2500
x853
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1451
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1202
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x7046
607D
Power Tree
data structures
,
trees
2600
x561
605D
Board Game
data structures
,
dfs and similar
2500
x792
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3396
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1173
601E
A Museum Robbery
data structures
,
dp
2800
x811
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1094
601B
Lipshitz Sequence
data structures
,
math
2100
x2070
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12820
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27849
597C
Subsequences
data structures
,
dp
1900
x4601
594D
REQ
data structures
,
number theory
2500
x1526
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1181
587F
Duff is Mad
data structures
,
strings
3000
x998
587E
Duff as a Queen
data structures
2900
x690
587C
Duff in the Army
data structures
,
trees
2200
x3708
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1968
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11623
576E
Painting Edges
binary search
,
data structures
3300
x1122
575I
Robots protection
data structures
2800
x423
575A
Fibonotci
data structures
,
math
,
matrices
2700
x769
573E
Bear and Bowling
data structures
,
greedy
3200
x1418
573D
Bear and Cavalry
data structures
,
divide and conquer
,
dp
3000
x452
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5710
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6772
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x652
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x8994
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x578
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4669
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9326
566D
Restructuring Company
data structures
,
dsu
1900
x3121
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5698
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1111
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1061
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3945
555C
Case of Chocolate
data structures
2200
x1948
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3691
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4368
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1657
549F
Yura and Developers
data structures
,
divide and conquer
2800
x851
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1953
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8296
543E
Listening to Music
constructive algorithms
,
data structures
3200
x281
542B
Duck Hunt
data structures
3100
x186
542A
Place Your Ad Here
data structures
,
sortings
2400
x522
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2016
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x630
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1549
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x376
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2380
533D
Landmarks
data structures
,
dp
3000
x218
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x376
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4665
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6685
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2347
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1647
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x522
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1169
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2256
522D
Closest Equals
*special problem
,
data structures
2000
x2986
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8715
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6347
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6289
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x38107
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x5936
515E
Drazil and Park
data structures
2300
x2064
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4162
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x6561
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20309
513D2
Constrained Tree
constructive algorithms
,
data structures
2600
x367
501D
Misha and Permutations Summation
data structures
2000
x2358
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