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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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*has extra registration
→ Filter Problems
Difficulty:
—
implementation
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
Submit
Status
Standings
Custom test
Problems
#
Name
282A
Bit++
implementation
800
x238094
158A
Next Round
*special problem
,
implementation
800
x233778
263A
Beautiful Matrix
implementation
800
x226255
112A
Petya and Strings
implementation
,
strings
800
x210413
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x199482
281A
Word Capitalization
implementation
,
strings
800
x197317
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x194615
118A
String Task
implementation
,
strings
1000
x182120
791A
Bear and Big Brother
implementation
800
x180207
266A
Stones on the Table
implementation
800
x179056
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x168828
59A
Word
implementation
,
strings
800
x163215
977A
Wrong Subtraction
implementation
800
x155943
69A
Young Physicist
implementation
,
math
1000
x155843
96A
Football
implementation
,
strings
900
x149869
110A
Nearly Lucky Number
implementation
800
x143457
734A
Anton and Danik
implementation
,
strings
800
x141151
41A
Translation
implementation
,
strings
800
x135813
116A
Tram
implementation
800
x132825
677A
Vanya and Fence
implementation
800
x131507
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x127445
1030A
In Search of an Easy Problem
implementation
800
x120769
467A
George and Accommodation
implementation
800
x114438
344A
Magnets
implementation
800
x112470
486A
Calculating Function
implementation
,
math
800
x110024
136A
Presents
implementation
800
x109763
200B
Drinks
implementation
,
math
800
x108440
61A
Ultra-Fast Mathematician
implementation
800
x104179
228A
Is your horseshoe on the other hoof?
implementation
800
x102580
133A
HQ9+
implementation
900
x100432
705A
Hulk
implementation
800
x99925
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94939
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91834
520A
Pangram
implementation
,
strings
800
x90352
144A
Arrival of the General
implementation
800
x89484
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x87539
443A
Anton and Letters
constructive algorithms
,
implementation
800
x84383
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84310
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82735
785A
Anton and Polyhedrons
implementation
,
strings
800
x82726
131A
cAPS lOCK
implementation
,
strings
1000
x81559
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x78255
4C
Registration System
data structures
,
hashing
,
implementation
1300
x77578
510A
Fox And Snake
implementation
800
x77538
427A
Police Recruits
implementation
800
x72889
1352A
Sum of Round Numbers
implementation
,
math
800
x72564
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71495
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x71292
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x71291
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x70346
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67719
581A
Vasya the Hipster
implementation
,
math
800
x67440
339B
Xenia and Ringroad
implementation
1000
x66653
151A
Soft Drinking
implementation
,
math
800
x66284
1742A
Sum
implementation
800
x65278
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x63336
451A
Game With Sticks
implementation
900
x62927
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x60769
1692A
Marathon
implementation
800
x60376
1512A
Spy Detected!
brute force
,
implementation
800
x60239
466A
Cheap Travel
implementation
1200
x59852
32B
Borze
expression parsing
,
implementation
800
x59163
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58706
1676A
Lucky?
implementation
800
x58472
1669A
Division?
implementation
800
x57628
758A
Holiday Of Equality
implementation
,
math
800
x57604
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56871
1807A
Plus or Minus
implementation
800
x56322
1560A
Dislike of Threes
implementation
800
x56174
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55808
1791A
Codeforces Checking
implementation
,
strings
800
x55473
1367A
Short Substrings
implementation
,
strings
800
x55024
1760A
Medium Number
implementation
,
sortings
800
x54269
313A
Ilya and Bank Account
implementation
,
number theory
900
x53798
703A
Mishka and Game
implementation
800
x53792
431A
Black Square
implementation
800
x51760
1850A
To My Critics
implementation
,
sortings
800
x51571
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50439
1915A
Odd One Out
bitmasks
,
implementation
800
x50261
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49861
1433A
Boring Apartments
implementation
,
math
800
x49508
1873A
Short Sort
brute force
,
implementation
800
x49177
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x49088
1619A
Square String?
implementation
,
strings
800
x48713
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48158
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x48153
1722A
Spell Check
implementation
800
x47244
492A
Vanya and Cubes
implementation
800
x46993
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46768
1535A
Fair Playoff
brute force
,
implementation
800
x46620
707A
Brain's Photos
implementation
800
x46533
1829A
Love Story
implementation
,
strings
800
x46245
514A
Chewbaсca and Number
greedy
,
implementation
1200
x46166
1426A
Floor Number
implementation
,
math
800
x45729
1703B
ICPC Balloons
data structures
,
implementation
800
x45702
474B
Worms
binary search
,
implementation
1200
x45049
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44772
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44655
379A
New Year Candles
implementation
1000
x44615
1950A
Stair, Peak, or Neither?
implementation
800
x44607
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