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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
39:54:00
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Difficulty:
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math
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
736D
Permutations
math
,
matrices
2800
x438
538G
Berserk Robot
constructive algorithms
,
math
,
sortings
3100
x438
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x437
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x434
388D
Fox and Perfect Sets
math
2700
x434
802D
Marmots (easy)
math
2100
x433
1835D
Doctor's Brown Hypothesis
dfs and similar
,
graphs
,
math
,
number theory
2900
x432
188C
LCM
*special problem
,
implementation
,
math
1400
x430
93E
Lostborn
dp
,
math
,
number theory
2600
x430
1540C2
Converging Array (Hard Version)
dp
,
math
2900
x427
1600F
Party Organization
brute force
,
math
,
probabilities
2300
x426
923E
Perpetual Subtraction
fft
,
math
,
matrices
3100
x425
1725E
Electrical Efficiency
combinatorics
,
data structures
,
dp
,
math
,
number theory
,
trees
2500
x424
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x424
662A
Gambling Nim
bitmasks
,
math
,
matrices
,
probabilities
2400
x424
1063D
Candies for Children
brute force
,
math
2600
x415
1630E
Expected Components
combinatorics
,
math
,
number theory
,
probabilities
2900
x413
717H
Pokermon League challenge
math
,
probabilities
2400
x413
154D
Flatland Fencing
games
,
math
2400
x412
95D
Horse Races
dp
,
math
2500
x410
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x407
1067E
Random Forest Rank
dp
,
graph matchings
,
math
,
trees
2800
x407
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x407
380D
Sereja and Cinema
combinatorics
,
math
2500
x407
396D
On Sum of Number of Inversions in Permutations
combinatorics
,
math
x406
1809G
Prediction
combinatorics
,
dp
,
math
2800
x402
1732E
Location
data structures
,
dp
,
math
,
number theory
2800
x401
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x401
1918G
Permutation of Given
constructive algorithms
,
math
2700
x398
1583G
Omkar and Time Travel
data structures
,
math
3000
x397
86B
Tetris revisited
constructive algorithms
,
graph matchings
,
greedy
,
math
2200
x397
1808E3
Minibuses on Venus (hard version)
brute force
,
combinatorics
,
dp
,
math
2800
x395
375E
Red and Black Tree
dp
,
implementation
,
math
3000
x395
930E
Coins Exhibition
data structures
,
dp
,
math
2900
x394
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x393
60D
Savior
brute force
,
dsu
,
math
2500
x391
1543E
The Final Pursuit
bitmasks
,
constructive algorithms
,
divide and conquer
,
graphs
,
greedy
,
math
2700
x390
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x390
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x389
1210E
Wojtek and Card Tricks
math
2700
x389
1158F
Density of subarrays
dp
,
math
3500
x389
1603E
A Perfect Problem
combinatorics
,
dp
,
math
3200
x387
1728G
Illumination
binary search
,
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
two pointers
2700
x386
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x383
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x383
42D
Strange town
constructive algorithms
,
math
2300
x381
332D
Theft of Blueprints
graphs
,
math
2400
x380
316E2
Summer Homework
data structures
,
math
2300
x377
1473G
Tiles
combinatorics
,
dp
,
fft
,
math
2800
x375
850E
Random Elections
bitmasks
,
brute force
,
divide and conquer
,
fft
,
math
2800
x375
1562F
Tubular Bells
interactive
,
math
,
number theory
,
probabilities
2900
x372
212C
Cowboys
combinatorics
,
dp
,
math
2100
x372
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x371
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x371
1450H1
Multithreading (Easy Version)
combinatorics
,
fft
,
math
2900
x367
1261F
Xor-Set
bitmasks
,
divide and conquer
,
math
3100
x367
185D
Visit of the Great
math
,
number theory
2600
x367
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x366
446D
DZY Loves Games
math
,
matrices
,
probabilities
2800
x366
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x365
1738G
Anti-Increasing Addicts
constructive algorithms
,
dp
,
greedy
,
math
2900
x365
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x365
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x364
852A
Digits
brute force
,
implementation
,
math
2500
x364
1045H
Self-exploration
math
2400
x363
1033F
Boolean Computer
bitmasks
,
brute force
,
fft
,
math
2800
x361
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x356
1423F
Coins
math
2700
x355
461D
Appleman and Complicated Task
dsu
,
math
2800
x354
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x353
209B
Pixels
constructive algorithms
,
math
2100
x351
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x348
1418F
Equal Product
data structures
,
math
,
number theory
,
two pointers
3000
x346
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x346
1168E
Xor Permutations
constructive algorithms
,
math
3100
x346
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x346
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x343
50E
Square Equation Roots
math
2300
x340
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x336
603D
Ruminations on Ruminants
geometry
,
math
2900
x336
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x334
100I
Rotation
*special problem
,
geometry
,
math
1500
x334
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x333
460E
Roland and Rose
brute force
,
geometry
,
math
,
sortings
2700
x333
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x331
64C
Table
*special problem
,
greedy
,
implementation
,
math
1600
x330
1776D
Teamwork
constructive algorithms
,
greedy
,
math
2800
x329
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x329
117D
Not Quick Transformation
divide and conquer
,
math
2500
x329
1063E
Lasers and Mirrors
constructive algorithms
,
math
3000
x327
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x327
1806F1
GCD Master (easy version)
greedy
,
math
,
number theory
,
sortings
2900
x325
93D
Flags
dp
,
math
,
matrices
2500
x325
57D
Journey
dp
,
math
2500
x325
180B
Divisibility Rules
math
,
number theory
2300
x324
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x321
73E
Morrowindows
math
,
number theory
2400
x320
1081G
Mergesort Strikes Back
math
,
probabilities
3200
x319
683D
Chocolate Bar
*special problem
,
math
1400
x319
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x319
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