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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
14:08:44
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→ Filter Problems
Difficulty:
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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
Standings
Custom test
Problems
#
Name
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x236
293C
Cube Problem
brute force
,
math
,
number theory
2400
x564
293B
Distinct Paths
brute force
,
combinatorics
2700
x841
292C
Beautiful IP Addresses
brute force
2000
x1158
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1288
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x130
290E
HQ
*special problem
,
constructive algorithms
2500
x198
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x289
288D
Polo the Penguin and Trees
combinatorics
,
dfs and similar
,
trees
2400
x737
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x826
286D
Tourists
data structures
,
sortings
2600
x374
286C
Main Sequence
greedy
,
implementation
2100
x1479
286B
Shifting
implementation
2200
x1110
285E
Positions in Permutations
combinatorics
,
dp
,
math
2600
x964
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x728
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x529
283C
Coin Troubles
dp
2100
x1419
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3514
282D
Yet Another Number Game
dp
,
games
2100
x1396
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x203
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1248
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3820
280A
Rectangle Puzzle
geometry
2000
x1453
279D
The Minimum Number of Variables
bitmasks
,
dp
2200
x719
277E
Binary Tree on Plane
flows
,
trees
2400
x1256
277D
Google Code Jam
dp
,
probabilities
2800
x333
277C
Game
games
,
implementation
2400
x448
277B
Set of Points
constructive algorithms
,
geometry
2300
x791
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1578
274E
Mirror Room
data structures
,
implementation
3000
x306
274D
Lovely Matrix
dfs and similar
,
graphs
,
greedy
,
sortings
2200
x1017
274C
The Last Hole!
brute force
,
geometry
2600
x348
273E
Dima and Game
dp
,
games
2600
x364
273D
Dima and Figure
dp
2400
x391
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1210
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x482
269E
String Theory
geometry
,
math
,
strings
3100
x108
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x446
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1631
268E
Playlist
math
,
probabilities
,
sortings
2100
x982
268D
Wall Bars
dp
2300
x504
267C
Berland Traffic
math
,
matrices
2700
x160
267B
Dominoes
dfs and similar
,
graphs
2000
x621
266E
More Queries to Array...
data structures
,
math
2500
x773
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x797
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1341
264E
Roadside Trees
data structures
,
dp
3000
x427
264D
Colorful Stones
dp
,
two pointers
2500
x412
264C
Choosing Balls
dp
2000
x2809
263E
Rhombus
brute force
,
data structures
,
dp
2500
x397
263C
Circle of Numbers
brute force
,
dfs and similar
,
implementation
2000
x1066
261E
Maxim and Calculator
brute force
,
dp
,
two pointers
2800
x408
261D
Maxim and Increasing Subsequence
dp
2600
x557
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x765
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x453
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1520
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1080
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1241
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1771
257E
Greedy Elevator
data structures
,
implementation
2200
x281
256E
Lucky Arrays
data structures
2400
x659
256D
Liars and Serge
dp
2700
x256
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x837
254E
Dormitory
dp
,
implementation
2100
x662
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x529
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x526
253D
Table with Letters - 2
brute force
,
two pointers
2000
x827
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x169
251D
Two Sets
bitmasks
,
math
2700
x471
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1013
250E
Mad Joe
brute force
2000
x462
249E
Endless Matrix
math
2600
x302
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x450
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x572
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x488
248C
Robo-Footballer
binary search
,
geometry
2000
x808
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x3088
245G
Suggested Friends
brute force
,
graphs
2200
x428
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x872
243E
Matrix
data structures
3000
x188
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x211
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x524
243B
Hydra
graphs
,
sortings
2000
x1213
242E
XOR on Segment
bitmasks
,
data structures
2000
x8804
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1856
241F
Race
brute force
,
implementation
2300
x261
241E
Flights
graphs
,
shortest paths
2600
x1019
241D
Numbers
2900
x365
241C
Mirror Box
geometry
,
implementation
2000
x509
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x775
240F
TorCoder
data structures
2600
x1882
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x355
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x349
238D
Tape Programming
data structures
,
implementation
2900
x247
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1220
237E
Build String
flows
,
graphs
2000
x1689
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x550
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x769
235D
Graph Game
graphs
3000
x499
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2056
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