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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
#
Name
340A
The Wall
math
1200
x7422
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x538
339D
Xenia and Bit Operations
data structures
,
trees
1700
x23666
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8129
339B
Xenia and Ringroad
implementation
1000
x66411
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x198425
338E
Optimize!
data structures
2600
x945
338D
GCD Table
chinese remainder theorem
,
math
,
number theory
2900
x1094
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1003
337D
Book of Evil
dfs and similar
,
divide and conquer
,
dp
,
trees
2000
x5823
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4771
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9091
337A
Puzzles
greedy
900
x75595
336E
Vasily the Bear and Painting Square
bitmasks
,
combinatorics
,
dp
,
implementation
2700
x109
336D
Vasily the Bear and Beautiful Strings
combinatorics
,
math
,
number theory
2100
x932
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2368
336B
Vasily the Bear and Fly
math
1900
x1176
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x9865
335F
Buy One, Get One Free
dp
,
greedy
3000
x456
335E
Counting Skyscrapers
dp
,
math
,
probabilities
2800
x218
335D
Rectangles and Square
brute force
,
dp
2400
x304
335C
More Reclamation
games
2100
x515
335B
Palindrome
constructive algorithms
,
dp
1900
x1966
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2515
334B
Eight Point Sets
sortings
1400
x3542
334A
Candy Bags
implementation
1000
x18047
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
333C
Lucky Tickets
brute force
,
constructive algorithms
2700
x374
333B
Chips
greedy
1800
x2602
333A
Secrets
greedy
1600
x3927
332E
Binary Key
dp
,
greedy
,
implementation
2400
x294
332D
Theft of Blueprints
graphs
,
math
2400
x381
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x881
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x7810
332A
Down the Hatch!
implementation
1300
x3523
331E2
Deja Vu
constructive algorithms
,
dp
3100
x216
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x162
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x169
331D2
Escaping on Beaveractor
graphs
2600
x127
331D1
Escaping on Beaveractor
dfs and similar
,
implementation
2400
x195
331C3
The Great Julya Calendar
dp
2500
x461
331C2
The Great Julya Calendar
dp
2400
x364
331C1
The Great Julya Calendar
dp
1100
x5933
331B2
Shave Beaver!
data structures
1900
x672
331B1
Shave Beaver!
implementation
1700
x717
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1384
331A1
Oh Sweet Beaverette
brute force
,
implementation
1400
x1336
330B
Road Construction
constructive algorithms
,
graphs
1300
x16360
330A
Cakeminator
brute force
,
implementation
800
x27445
329E
Evil
math
3100
x164
329D
The Evil Temple and the Moving Rocks
constructive algorithms
2500
x387
329C
Graph Reconstruction
constructive algorithms
2400
x877
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x6110
329A
Purification
constructive algorithms
,
greedy
1500
x4590
328B
Sheldon and Ice Pieces
greedy
1500
x1254
328A
IQ Test
implementation
1800
x1933
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1347
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2219
327C
Magic Five
combinatorics
,
math
1700
x3111
327B
Hungry Sequence
math
1200
x18992
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x39986
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x751
325D
Reclamation
dsu
2900
x484
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x331
325B
Stadium and Games
binary search
,
math
1800
x1471
325A
Square and Rectangles
implementation
1500
x2132
323C
Two permutations
data structures
2400
x569
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x362
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x719
322B
Ciel and Flowers
combinatorics
,
math
1600
x11493
322A
Ciel and Dancing
greedy
1000
x8082
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x4497
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x526
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6783
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2958
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3551
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7084
320A
Magic Numbers
brute force
,
greedy
900
x33619
319E
Ping-Pong
data structures
3000
x632
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x612
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4739
319B
Psychos in a Line
data structures
,
implementation
1900
x4023
319A
Malek Dance Club
combinatorics
,
math
1600
x2756
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7376
318A
Even Odds
math
900
x106275
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x152
317D
Game with Powers
dp
,
games
2300
x972
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x490
317B
Ants
brute force
,
implementation
2000
x1544
317A
Perfect Pair
brute force
1600
x4530
316G3
Good Substrings
string suffix structures
2400
x487
316G2
Good Substrings
string suffix structures
2200
x465
316G1
Good Substrings
hashing
,
strings
1700
x927
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x163
316F2
Suns and Rays
2300
x149
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x164
316E3
Summer Homework
data structures
,
math
2300
x504
316E2
Summer Homework
data structures
,
math
2300
x380
316E1
Summer Homework
brute force
,
data structures
1500
x1447
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