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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
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Custom test
Problems
#
Name
383D
Antimatter
dp
2300
x3036
383C
Propagating tree
data structures
,
dfs and similar
,
trees
2000
x6552
383B
Volcanoes
binary search
,
implementation
,
sortings
,
two pointers
2500
x697
383A
Milking cows
data structures
,
greedy
1600
x5301
382E
Ksenia and Combinatorics
combinatorics
,
dp
2600
x383
382D
Ksenia and Pawns
dfs and similar
,
graphs
,
implementation
,
trees
2200
x682
382C
Arithmetic Progression
implementation
,
sortings
1700
x8324
382B
Number Busters
binary search
,
math
2000
x1412
380E
Sereja and Dividing
data structures
2600
x307
380D
Sereja and Cinema
combinatorics
,
math
2500
x468
380C
Sereja and Brackets
data structures
,
schedules
2000
x15322
380B
Sereja and Tree
graphs
,
implementation
2400
x537
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2688
379G
New Year Cactus
dp
3100
x142
379F
New Year Tree
data structures
,
divide and conquer
,
trees
2400
x2324
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x341
379D
New Year Letter
bitmasks
,
brute force
,
dp
2000
x1566
377E
Cookie Clicker
dp
,
geometry
2800
x465
377D
Developing Game
data structures
2400
x1166
377C
Captains Mode
bitmasks
,
dp
,
games
2200
x1150
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x2114
377A
Maze
dfs and similar
1600
x22705
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x412
375D
Tree and Queries
data structures
,
dfs and similar
,
trees
2400
x6955
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x568
375B
Maximum Submatrix 2
data structures
,
dp
,
implementation
,
sortings
1600
x5079
375A
Divisible by Seven
math
,
number theory
1600
x4864
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x186
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x885
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2755
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2941
373B
Making Sequences is Fun
binary search
,
implementation
,
math
1600
x2487
372E
Drawing Circles is Fun
combinatorics
,
geometry
3000
x175
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x991
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x4181
372B
Counting Rectangles is Fun
brute force
,
divide and conquer
,
dp
1900
x2647
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x13166
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1309
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5709
371C
Hamburgers
binary search
,
brute force
1600
x26831
370E
Summer Reading
dp
,
greedy
2500
x295
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x635
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1584
369E
Valera and Queries
binary search
,
data structures
2200
x2183
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x1161
369C
Valera and Elections
dfs and similar
,
graphs
,
trees
1600
x10165
367E
Sereja and Intervals
combinatorics
,
dp
2700
x1147
367D
Sereja and Sets
bitmasks
,
dfs and similar
2400
x659
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1795
367B
Sereja ans Anagrams
binary search
,
data structures
1900
x2477
366E
Dima and Magic Guitar
brute force
,
implementation
,
math
2200
x775
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1567
366C
Dima and Salad
dp
1900
x4875
364E
Empty Rectangles
divide and conquer
,
two pointers
3000
x578
364D
Ghd
brute force
,
math
,
probabilities
2900
x2112
364C
Beautiful Set
brute force
,
number theory
2300
x599
364B
Free Market
dp
,
greedy
2200
x1185
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4677
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x203
363D
Renting Bikes
binary search
,
greedy
1800
x3965
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x814
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x931
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1789
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x711
360D
Levko and Sets
number theory
2600
x406
360C
Levko and Strings
combinatorics
,
dp
2500
x1109
360B
Levko and Array
binary search
,
dp
2000
x3026
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2057
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x470
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x5142
359C
Prime Number
math
,
number theory
1900
x3148
358E
Dima and Kicks
brute force
,
dsu
,
graphs
,
implementation
2300
x399
358D
Dima and Hares
dp
,
greedy
1800
x4090
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x2032
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x410
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x973
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1273
356B
Xenia and Hamming
implementation
,
math
1900
x1934
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x878
354D
Transferring Pyramid
dp
2900
x464
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x3083
354B
Game with Strings
bitmasks
,
dp
,
games
2400
x460
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x588
353D
Queue
constructive algorithms
,
dp
2000
x2926
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4916
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2292
351E
Jeff and Permutation
greedy
2200
x1612
351D
Jeff and Removing Periods
data structures
2700
x1092
351C
Jeff and Brackets
dp
,
matrices
2500
x562
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2406
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2928
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x779
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x269
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6560
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x14035
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x445
348D
Turtles
dp
,
matrices
2500
x1739
348C
Subset Sums
brute force
,
data structures
2500
x2220
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2103
348A
Mafia
binary search
,
math
,
sortings
1600
x13238
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