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Codeforces Round 953 (Div. 2)
2 days
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Difficulty:
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dp
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
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9331
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3945
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5418
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8304
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11397
543A
Writing Code
dp
1800
x7728
540D
Bad Luck Island
dp
,
probabilities
1900
x5232
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2227
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2324
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4666
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1447
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6291
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x6745
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1761
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5219
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x2022
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6139
494B
Obsessive String
dp
,
strings
2000
x2612
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3382
479E
Riding in a Lift
combinatorics
,
dp
1900
x4972
478D
Red-Green Towers
dp
2000
x5507
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3174
474D
Flowers
dp
1700
x24193
467C
George and Job
dp
,
implementation
1700
x14200
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34903
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x5988
461B
Appleman and Tree
dfs and similar
,
dp
,
trees
2000
x5368
459E
Pashmak and Graph
dp
,
sortings
1900
x5285
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5730
453B
Little Pony and Harmony Chest
bitmasks
,
brute force
,
dp
2000
x4551
448C
Painting Fence
divide and conquer
,
dp
,
greedy
1900
x7877
446A
DZY Loves Sequences
dp
,
implementation
,
two pointers
1600
x12297
435D
Special Grid
brute force
,
dp
,
greedy
2000
x748
432D
Prefixes and Suffixes
dp
,
string suffix structures
,
strings
,
two pointers
2000
x8449
431C
k-Tree
dp
,
implementation
,
trees
1600
x24795
429B
Working out
dp
1600
x8342
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2383
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7693
413D
2048
bitmasks
,
dp
2000
x753
407B
Long Path
dp
,
implementation
1600
x6435
404D
Minesweeper 1D
dp
,
implementation
1900
x2067
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2525
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x4002
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x749
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9447
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1485
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x4970
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x850
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2669
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2530
366C
Dima and Salad
dp
1900
x4586
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1660
360B
Levko and Array
binary search
,
dp
2000
x2717
358D
Dima and Hares
dp
,
greedy
1800
x3912
353D
Queue
constructive algorithms
,
dp
2000
x2751
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2300
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2733
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13566
346B
Lucky Common Subsequence
dp
,
strings
2000
x3364
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8176
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5880
335B
Palindrome
constructive algorithms
,
dp
1900
x2016
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2979
316B2
EKG
dfs and similar
,
dp
1600
x1570
314C
Sereja and Subsequences
data structures
,
dp
2000
x1813
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2111
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x13316
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4400
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2337
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1512
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3616
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1416
279C
Ladder
dp
,
implementation
,
two pointers
1700
x8101
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x13185
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x4914
269B
Greenhouse Effect
dp
1700
x6165
264C
Choosing Balls
dp
2000
x2783
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x761
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1371
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1764
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1423
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1013
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6080
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3378
234F
Fence
dp
1800
x1719
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1392
228C
Fractal Detector
dp
,
hashing
2000
x446
225C
Barcode
dp
,
matrices
1700
x8825
223B
Two Strings
data structures
,
dp
,
strings
1900
x1731
222E
Decoding Genome
dp
,
matrices
1900
x2584
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8780
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6568
213C
Relay Race
dp
2000
x2750
213B
Numbers
combinatorics
,
dp
1900
x1668
209A
Multicolored Marbles
dp
,
math
1600
x2264
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1791
208B
Solitaire
dfs and similar
,
dp
1900
x1345
201C
Fragile Bridges
dp
2000
x1295
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x2974
187B
AlgoRace
dp
,
shortest paths
1800
x1939
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