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Pinely Round 4 (Div. 1 + Div. 2)
07:58:31
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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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Status
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Custom test
Problems
#
Name
520C
DNA Alignment
math
,
strings
1500
x4123
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x49583
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6323
519C
A and B and Team Training
greedy
,
implementation
,
math
,
number theory
1300
x19489
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x6871
518C
Anya and Smartphone
constructive algorithms
,
data structures
,
implementation
1600
x5955
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7893
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9170
515C
Drazil and Factorial
greedy
,
math
,
sortings
1400
x25486
515B
Drazil and His Happy Friends
brute force
,
dsu
,
meet-in-the-middle
,
number theory
1300
x7402
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20517
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1772
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2576
513B1
Permutations
brute force
1400
x3591
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5300
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15700
510B
Fox And Two Dots
dfs and similar
1500
x13707
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9572
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4434
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22366
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4311
507B
Amr and Pins
geometry
,
math
1400
x24243
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6254
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12419
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5600
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3098
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5786
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8793
498A
Crazy Town
geometry
1700
x6404
496D
Tennis Game
binary search
1900
x2995
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7679
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5843
495B
Modular Equations
math
,
number theory
1600
x6722
494A
Treasure
greedy
1500
x6165
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9586
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6733
493B
Vasya and Wrestling
implementation
1400
x13156
493A
Vasya and Football
implementation
1300
x6061
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3138
492C
Vanya and Exams
greedy
,
sortings
1400
x13863
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2116
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9000
490B
Queue
dsu
,
implementation
1500
x5947
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6643
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x45423
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2094
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3700
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11613
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x17287
485B
Valuable Resources
brute force
,
greedy
1300
x6484
485A
Factory
implementation
,
math
,
matrices
1400
x8163
484A
Bits
bitmasks
,
constructive algorithms
1700
x11010
483B
Friends and Presents
binary search
,
math
1800
x4020
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6310
479E
Riding in a Lift
combinatorics
,
dp
1900
x5030
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4738
479C
Exams
greedy
,
sortings
1400
x29114
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7809
478C
Table Decorations
greedy
1800
x17818
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35949
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4448
476C
Dreamoon and Sums
math
1600
x5492
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29947
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8371
474D
Flowers
dp
1700
x24597
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x5190
472C
Design Tutorial: Make It Nondeterministic
greedy
1400
x6343
472B
Design Tutorial: Learn from Life
1300
x7396
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x7760
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3545
471B
MUH and Important Things
implementation
,
sortings
1300
x5920
470E
Chessboard
*special problem
1900
x196
470D
Caesar Cipher
*special problem
1900
x151
470C
Eval
*special problem
1900
x238
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x258
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x670
469B
Chat Online
implementation
1300
x12497
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7946
467C
George and Job
dp
,
implementation
1700
x14366
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x35337
464A
No to Palindromes!
greedy
,
strings
1700
x5841
463D
Gargari and Permutations
dfs and similar
,
dp
,
graphs
,
implementation
1900
x6193
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8652
462B
Appleman and Card Game
greedy
1300
x14250
460C
Present
binary search
,
data structures
,
greedy
1700
x6130
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12224
459E
Pashmak and Graph
dp
,
sortings
1900
x5325
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9832
459C
Pashmak and Buses
combinatorics
,
constructive algorithms
,
math
1900
x6137
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x39467
457B
Distributed Join
greedy
1900
x1128
457A
Golden System
math
,
meet-in-the-middle
1700
x1267
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5800
455A
Boredom
dp
1500
x56238
453A
Little Pony and Expected Maximum
probabilities
1600
x10219
452D
Washer, Dryer, Folder
greedy
,
implementation
1900
x1483
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1988
451C
Predict Outcome of the Game
brute force
,
implementation
,
math
1700
x3315
451B
Sort the Array
implementation
,
sortings
1300
x44314
450B
Jzzhu and Sequences
implementation
,
math
1300
x25825
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