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Rayan
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Before contest
Codeforces Round (Div. 1)
7 days
Before contest
Codeforces Round (Div. 2)
7 days
→ Filter Problems
Difficulty:
—
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
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Status
Standings
Custom test
Problems
#
Name
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2723
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2974
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x9198
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2620
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3897
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x12290
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x18049
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17839
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x196502
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4928
545D
Queue
greedy
,
implementation
,
sortings
1300
x25931
545C
Woodcutters
dp
,
greedy
1500
x29108
545B
Equidistant String
greedy
1100
x11787
545A
Toy Cars
implementation
900
x11720
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x8174
544A
Set of Strings
implementation
,
strings
1100
x8399
543E
Listening to Music
constructive algorithms
,
data structures
3200
x308
543D
Road Improvement
dp
,
trees
2300
x2850
543C
Remembering Strings
bitmasks
,
dp
2500
x1434
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x4237
543A
Writing Code
dp
1800
x8185
542F
Quest
dp
,
greedy
2100
x950
542E
Playing on Graph
graphs
,
shortest paths
2600
x891
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x526
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1151
542B
Duck Hunt
data structures
3100
x214
542A
Place Your Ad Here
data structures
,
sortings
2400
x585
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2197
540D
Bad Luck Island
dp
,
probabilities
1900
x5672
540C
Ice Cave
dfs and similar
2000
x7538
540B
School Marks
greedy
,
implementation
1700
x4761
540A
Combination Lock
implementation
800
x33301
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x678
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x483
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1761
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1557
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2474
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5899
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18358
538A
Cutting Banner
brute force
,
implementation
1400
x7175
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x409
536D
Tavas in Kansas
dp
,
games
2900
x743
535E
Tavas and Pashmaks
geometry
,
math
2600
x822
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x4051
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3815
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x23149
535A
Tavas and Nafas
brute force
,
implementation
1000
x12404
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x494
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x372
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2450
534C
Polycarpus' Dice
math
1600
x5087
534B
Covered Path
dp
,
greedy
,
math
1400
x10532
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12471
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x918
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2298
533D
Landmarks
data structures
,
dp
3000
x239
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2227
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2475
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x410
530I
Different variables
*special problem
2500
x48
530H
Points in triangle
*special problem
,
geometry
2100
x124
530G
Levenshtein distance
*special problem
2100
x167
530F
Jumping frogs
*special problem
2100
x109
530E
Sum and product
*special problem
1700
x309
530D
Set subtraction
*special problem
1600
x454
530C
Diophantine equation
*special problem
1500
x561
530B
String inside out
*special problem
1600
x545
530A
Quadratic equation
*special problem
1500
x680
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x882
528E
Triangles 3000
geometry
,
sortings
3100
x223
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2335
527E
Data Center Drama
dfs and similar
,
graphs
2600
x2048
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4847
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x7091
527B
Error Correct System
greedy
1500
x3908
527A
Playing with Paper
implementation
,
math
1100
x14690
526G
Spiders Evil Plan
greedy
,
trees
3300
x772
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2772
526E
Transmitting Levels
dp
,
implementation
2400
x1105
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2205
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2553
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4532
526A
King of Thieves
brute force
,
implementation
1300
x4824
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x3484
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1826
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5857
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9541
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x15180
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x548
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1234
524D
Social Network
greedy
,
two pointers
2100
x956
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x2066
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1470
524A
Возможно, вы знаете этих людей?
implementation
1600
x1421
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2366
523C
Name Quest
*special problem
,
greedy
1400
x2517
523B
Mean Requests
*special problem
,
implementation
1500
x953
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2668
522D
Closest Equals
*special problem
,
data structures
2000
x3350
522C
Chicken or Fish?
greedy
2100
x727
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