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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
#
Name
559E
Gerald and Path
dp
,
sortings
3000
x856
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10363
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5596
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1110
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10168
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3939
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7079
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3686
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4355
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16017
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2393
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17183
545D
Queue
greedy
,
implementation
,
sortings
1300
x24078
542A
Place Your Ad Here
data structures
,
sortings
2400
x520
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2008
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x443
538F
A Heap of Heaps
brute force
,
data structures
,
math
,
sortings
2200
x1496
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x853
528E
Triangles 3000
geometry
,
sortings
3100
x214
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4650
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5702
524E
Rooks and Rectangles
data structures
,
sortings
2400
x1155
524C
The Art of Dealing with ATM
binary search
,
sortings
1900
x1979
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37706
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x24960
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15103
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x17018
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5509
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8696
496E
Distributing Parts
greedy
,
sortings
2100
x1629
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6671
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3118
492C
Vanya and Exams
greedy
,
sortings
1400
x13694
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71170
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55554
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46536
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9826
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6779
479C
Exams
greedy
,
sortings
1400
x28536
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7545
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x204
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3116
471B
MUH and Important Things
implementation
,
sortings
1300
x5886
461A
Appleman and Toastman
greedy
,
sortings
1200
x15194
460E
Roland and Rose
brute force
,
geometry
,
math
,
sortings
2700
x335
459E
Pashmak and Graph
dp
,
sortings
1900
x5258
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9504
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x38475
456A
Laptops
sortings
1100
x45459
451B
Sort the Array
implementation
,
sortings
1300
x43052
439D
Devu and his Brother
binary search
,
sortings
,
ternary search
,
two pointers
1700
x5795
439B
Devu, the Dumb Guy
implementation
,
sortings
1200
x14041
437D
The Child and Zoo
dsu
,
sortings
1900
x3135
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13507
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9157
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x252
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2397
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x36348
432C
Prime Swaps
greedy
,
sortings
1800
x2437
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56662
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2217
425A
Sereja and Swaps
brute force
,
sortings
1500
x3810
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7332
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x493
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2372
412B
Network Configuration
greedy
,
sortings
900
x5267
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94514
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x4999
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3087
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11337
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3484
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x653
382C
Arithmetic Progression
implementation
,
sortings
1700
x8157
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6583
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x337
379C
New Year Ratings Change
greedy
,
sortings
1400
x6493
378B
Semifinals
implementation
,
sortings
1300
x5103
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x1975
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x4956
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12365
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1501
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1702
362B
Petya and Staircases
implementation
,
sortings
1100
x13501
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2169
352B
Jeff and Periods
implementation
,
sortings
1300
x15820
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x256
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6456
348A
Mafia
binary search
,
math
,
sortings
1600
x12611
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8775
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x198419
334B
Eight Point Sets
sortings
1400
x3542
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1069
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1847
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x881
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1384
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x515
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5522
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7746
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x5985
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