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Problems
#
Name
290D
Orange
*special problem
,
implementation
1400
x1922
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1694
290B
QR code
*special problem
,
implementation
1500
x2641
290A
Mysterious strings
*special problem
,
implementation
1400
x3280
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x19371
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x10589
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x417
288D
Polo the Penguin and Trees
combinatorics
,
dfs and similar
,
trees
2400
x874
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2480
288B
Polo the Penguin and Houses
combinatorics
1500
x3270
288A
Polo the Penguin and Strings
greedy
1300
x6883
287B
Pipeline
binary search
,
math
1700
x12135
287A
IQ Test
brute force
,
implementation
1100
x22463
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x1104
286D
Tourists
data structures
,
sortings
2600
x505
286C
Main Sequence
greedy
,
implementation
2100
x1639
286B
Shifting
implementation
2200
x1202
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3496
285E
Positions in Permutations
combinatorics
,
dp
,
math
2600
x1466
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1715
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x26888
285B
Find Marble
implementation
1200
x15906
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x14348
284B
Cows and Poker Game
brute force
,
implementation
1000
x7475
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x7569
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x965
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x720
283C
Coin Troubles
dp
2100
x1638
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3987
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6962
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x4874
282D
Yet Another Number Game
dp
,
games
2100
x1713
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x10470
282B
Painting Eggs
greedy
,
math
1500
x14221
282A
Bit++
implementation
800
x389677
281B
Nearest Fraction
brute force
,
implementation
,
two pointers
1700
x3478
281A
Word Capitalization
implementation
,
strings
800
x290639
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x358
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1816
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x5793
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x5451
280A
Rectangle Puzzle
geometry
2000
x1631
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1655
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x912
279C
Ladder
dp
,
implementation
,
two pointers
1700
x9149
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x82247
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x6018
278B
New Problem
brute force
,
strings
1500
x3670
278A
Circle Line
implementation
800
x13002
277E
Binary Tree on Plane
flows
,
trees
2400
x1555
277D
Google Code Jam
dp
,
probabilities
2800
x448
277C
Game
games
,
implementation
2400
x516
277B
Set of Points
constructive algorithms
,
geometry
2300
x867
277A
Learning Languages
dfs and similar
,
dsu
1400
x22652
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1992
276D
Little Girl and Maximum XOR
bitmasks
,
dp
,
greedy
,
implementation
,
math
1700
x17259
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x44711
276B
Little Girl and Game
games
,
greedy
1300
x33127
276A
Lunch Rush
implementation
900
x30769
275B
Convex Shape
constructive algorithms
,
implementation
1700
x3112
275A
Lights Out
implementation
900
x37984
274E
Mirror Room
data structures
,
implementation
3000
x435
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1241
274C
The Last Hole!
brute force
,
geometry
2600
x415
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5944
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x10969
273E
Dima and Game
dp
,
games
2600
x414
273D
Dima and Figure
dp
2400
x504
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1363
272D
Dima and Two Sequences
combinatorics
,
math
,
sortings
1600
x2893
272C
Dima and Staircase
data structures
,
implementation
1500
x7304
272B
Dima and Sequence
implementation
,
math
1400
x4356
272A
Dima and Friends
implementation
,
math
1000
x28405
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x697
271D
Good Substrings
data structures
,
strings
1800
x15147
271C
Secret
constructive algorithms
,
implementation
1500
x3169
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x16135
271A
Beautiful Year
brute force
800
x191439
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4501
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x52518
269E
String Theory
geometry
,
math
,
strings
3100
x124
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x539
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1974
269B
Greenhouse Effect
dp
1700
x7201
269A
Magical Boxes
greedy
,
math
1600
x3733
268E
Playlist
math
,
probabilities
,
sortings
2100
x1189
268D
Wall Bars
dp
2300
x640
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x14815
268B
Buttons
implementation
,
math
1000
x36644
268A
Games
brute force
800
x109440
267C
Berland Traffic
math
,
matrices
2700
x299
267B
Dominoes
dfs and similar
,
graphs
2000
x800
267A
Subtractions
math
,
number theory
900
x9936
266E
More Queries to Array...
data structures
,
math
2500
x1195
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x1052
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1468
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x176411
266A
Stones on the Table
implementation
800
x263080
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x18076
265A
Colorful Stones (Simplified Edition)
implementation
800
x44147
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