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Rayan
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Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
01:22:16
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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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Custom test
Problems
#
Name
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10443
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1093
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2234
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x4035
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7214
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8280
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7958
556A
Case of the Zeros and Ones
greedy
900
x40675
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2431
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x874
555C
Case of Chocolate
data structures
2200
x1975
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3760
555A
Case of Matryoshkas
implementation
1500
x6556
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x10032
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x13333
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x558
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x1012
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1821
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2125
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8752
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1633
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4507
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5515
552B
Vanya and Books
implementation
,
math
1200
x15500
552A
Vanya and Table
implementation
,
math
1000
x9631
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1892
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1982
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3618
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3864
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16551
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1399
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3498
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x29091
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x21908
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x38599
549H
Degenerate Matrix
binary search
,
math
2100
x2000
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2471
549F
Yura and Developers
data structures
,
divide and conquer
2800
x900
549E
Sasha Circle
geometry
,
math
2700
x156
549D
Haar Features
greedy
,
implementation
1900
x2150
549C
The Game Of Parity
games
2200
x1746
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1507
549A
Face Detection
implementation
,
strings
900
x9532
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8494
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x10025
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x2136
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2652
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2928
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8949
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2600
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3866
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x12069
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17794
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17688
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x189577
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4823
545D
Queue
greedy
,
implementation
,
sortings
1300
x25534
545C
Woodcutters
dp
,
greedy
1500
x28527
545B
Equidistant String
greedy
1100
x11723
545A
Toy Cars
implementation
900
x11681
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x8059
544A
Set of Strings
implementation
,
strings
1100
x8318
543E
Listening to Music
constructive algorithms
,
data structures
3200
x300
543D
Road Improvement
dp
,
trees
2300
x2804
543C
Remembering Strings
bitmasks
,
dp
2500
x1410
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x4185
543A
Writing Code
dp
1800
x8053
542F
Quest
dp
,
greedy
2100
x944
542E
Playing on Graph
graphs
,
shortest paths
2600
x880
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x515
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1141
542B
Duck Hunt
data structures
3100
x206
542A
Place Your Ad Here
data structures
,
sortings
2400
x581
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2161
540D
Bad Luck Island
dp
,
probabilities
1900
x5581
540C
Ice Cave
dfs and similar
2000
x7405
540B
School Marks
greedy
,
implementation
1700
x4716
540A
Combination Lock
implementation
800
x32961
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x669
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x473
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1745
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1549
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2456
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5851
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18221
538A
Cutting Banner
brute force
,
implementation
1400
x7153
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x405
536D
Tavas in Kansas
dp
,
games
2900
x736
535E
Tavas and Pashmaks
geometry
,
math
2600
x806
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3971
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3806
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x22835
535A
Tavas and Nafas
brute force
,
implementation
1000
x12267
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x476
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x358
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2424
534C
Polycarpus' Dice
math
1600
x5046
534B
Covered Path
dp
,
greedy
,
math
1400
x10387
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12358
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x911
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