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Codeforces Round (Div. 1 + Div. 2)
46:59:15
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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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Problems
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Status
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Custom test
Problems
#
Name
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1476
549A
Face Detection
implementation
,
strings
900
x9359
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8284
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9842
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1948
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2430
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2720
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8257
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2314
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3491
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11287
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17104
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17247
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168957
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4400
545D
Queue
greedy
,
implementation
,
sortings
1300
x24156
545C
Woodcutters
dp
,
greedy
1500
x26334
545B
Equidistant String
greedy
1100
x11436
545A
Toy Cars
implementation
900
x11443
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7832
544A
Set of Strings
implementation
,
strings
1100
x7756
543E
Listening to Music
constructive algorithms
,
data structures
3200
x280
543D
Road Improvement
dp
,
trees
2300
x2542
543C
Remembering Strings
bitmasks
,
dp
2500
x1358
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3842
543A
Writing Code
dp
1800
x7698
542F
Quest
dp
,
greedy
2100
x750
542E
Playing on Graph
graphs
,
shortest paths
2600
x809
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x497
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1099
542B
Duck Hunt
data structures
3100
x126
542A
Place Your Ad Here
data structures
,
sortings
2400
x521
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2011
540D
Bad Luck Island
dp
,
probabilities
1900
x5189
540C
Ice Cave
dfs and similar
2000
x7038
540B
School Marks
greedy
,
implementation
1700
x4610
540A
Combination Lock
implementation
800
x31650
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x628
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x443
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1499
538E
Demiurges Play Again
dfs and similar
,
dp
,
math
,
trees
2200
x1500
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2406
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5761
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17644
538A
Cutting Banner
brute force
,
implementation
1400
x7073
536E
Tavas on the Path
data structures
,
divide and conquer
,
trees
3100
x372
536D
Tavas in Kansas
dp
,
games
2900
x710
535E
Tavas and Pashmaks
geometry
,
math
2600
x798
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3789
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3706
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21706
535A
Tavas and Nafas
brute force
,
implementation
1000
x11846
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x444
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x341
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2374
534C
Polycarpus' Dice
math
1600
x4933
534B
Covered Path
dp
,
greedy
,
math
1400
x9897
534A
Exam
constructive algorithms
,
implementation
,
math
1100
x12055
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x866
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2220
533D
Landmarks
data structures
,
dp
3000
x216
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2148
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2305
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x374
530I
Different variables
*special problem
2500
x43
530H
Points in triangle
*special problem
,
geometry
2100
x119
530G
Levenshtein distance
*special problem
2100
x147
530F
Jumping frogs
*special problem
2100
x97
530E
Sum and product
*special problem
1700
x302
530D
Set subtraction
*special problem
1600
x446
530C
Diophantine equation
*special problem
1500
x539
530B
String inside out
*special problem
1600
x537
530A
Quadratic equation
*special problem
1500
x668
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x853
528E
Triangles 3000
geometry
,
sortings
3100
x214
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2071
527E
Data Center Drama
dfs and similar
,
graphs
2600
x1812
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4655
527C
Glass Carving
binary search
,
data structures
,
implementation
1500
x6668
527B
Error Correct System
greedy
1500
x3856
527A
Playing with Paper
implementation
,
math
1100
x14114
526G
Spiders Evil Plan
greedy
,
trees
3300
x692
526F
Pudding Monsters
data structures
,
divide and conquer
3000
x2328
526E
Transmitting Levels
dp
,
implementation
2400
x1056
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2099
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2270
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4470
526A
King of Thieves
brute force
,
implementation
1300
x4726
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2765
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1640
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5705
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9198
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13935
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x521
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1164
524D
Social Network
greedy
,
two pointers
2100
x945
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x1981
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1445
524A
Возможно, вы знаете этих людей?
implementation
1600
x1393
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x2245
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