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Codeforces Round (Div. 2)
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
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1350
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x587
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2968
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1550
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7367
653F
Paper task
data structures
,
string suffix structures
,
strings
2600
x971
652D
Nested Segments
data structures
,
sortings
1800
x3864
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x593
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1247
650A
Watchmen
data structures
,
geometry
,
math
1400
x15221
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x107
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x226
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x911
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2618
643G
Choosing Ads
data structures
3200
x928
641E
Little Artem and Time Machine
data structures
2000
x3004
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x395
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x825
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1974
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x15455
633H
Fibonacci-ish II
data structures
,
implementation
3100
x582
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x763
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
x2709
631E
Product Sum
data structures
,
dp
,
geometry
2600
x2265
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2014
631C
Report
data structures
,
sortings
1700
x3761
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x975
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3921
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x843
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1158
627B
Factory Repairs
data structures
1700
x2730
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x522
625E
Frog Fights
data structures
,
greedy
2800
x325
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6272
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x710
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5341
618E
Robot Arm
data structures
,
geometry
2500
x587
617E
XOR and Favorite Number
data structures
2200
x8007
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x8977
612C
Replace To Make Regular Bracket Sequence
data structures
,
expression parsing
,
math
1400
x7821
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x860
610E
Alphabet Permutations
data structures
,
strings
2500
x857
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1460
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1209
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x7200
607D
Power Tree
data structures
,
trees
2600
x562
605D
Board Game
data structures
,
dfs and similar
2500
x792
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3402
603E
Pastoral Oddities
data structures
,
divide and conquer
,
dsu
,
math
,
trees
3000
x1189
601E
A Museum Robbery
data structures
,
dp
2800
x832
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1100
601B
Lipshitz Sequence
data structures
,
math
2100
x2203
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12940
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x28291
597C
Subsequences
data structures
,
dp
1900
x4663
594D
REQ
data structures
,
number theory
2500
x1531
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1187
587F
Duff is Mad
data structures
,
strings
3000
x1005
587E
Duff as a Queen
data structures
2900
x691
587C
Duff in the Army
data structures
,
trees
2200
x3734
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1987
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11748
576E
Painting Edges
binary search
,
data structures
3300
x1138
575I
Robots protection
data structures
2800
x424
575A
Fibonotci
data structures
,
math
,
matrices
2700
x772
573E
Bear and Bowling
data structures
,
greedy
3200
x1474
573D
Bear and Cavalry
data structures
,
divide and conquer
,
dp
3000
x457
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5735
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6796
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x652
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x9013
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x580
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4693
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9344
566D
Restructuring Company
data structures
,
dsu
1900
x3149
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5759
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1118
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1070
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3946
555C
Case of Chocolate
data structures
2200
x1951
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3694
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4386
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1676
549F
Yura and Developers
data structures
,
divide and conquer
2800
x855
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1971
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8364
543E
Listening to Music
constructive algorithms
,
data structures
3200
x284
542B
Duck Hunt
data structures
3100
x193
542A
Place Your Ad Here
data structures
,
sortings
2400
x526
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2048
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x633
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1552
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x377
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2380
533D
Landmarks
data structures
,
dp
3000
x219
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x379
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4676
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6717
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2362
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