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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
12:03:11
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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
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1881
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8765
242B
Big Segment
implementation
,
sortings
1100
x15845
242A
Heads or Tails
brute force
,
implementation
1100
x6393
241G
Challenging Balloons
constructive algorithms
1900
x548
241F
Race
brute force
,
implementation
2300
x263
241E
Flights
graphs
,
shortest paths
2600
x1113
241D
Numbers
2900
x381
241C
Mirror Box
geometry
,
implementation
2000
x512
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x818
241A
Old Peykan
greedy
1300
x2243
240F
TorCoder
data structures
2600
x1968
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x356
239B
Easy Tape Programming
brute force
,
implementation
1500
x1374
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x19029
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x394
238D
Tape Programming
data structures
,
implementation
2900
x251
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1247
238B
Boring Partition
constructive algorithms
1800
x1333
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2048
237E
Build String
flows
,
graphs
2000
x1739
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x567
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5837
237B
Young Table
implementation
,
sortings
1500
x2241
237A
Free Cash
implementation
1000
x26966
236B
Easy Number Challenge
implementation
,
number theory
1300
x14433
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x215135
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x779
235D
Graph Game
graphs
3000
x506
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2148
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3590
235A
LCM Challenge
number theory
1600
x17960
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x568
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1480
234F
Fence
dp
1800
x1749
234E
Champions' League
implementation
1600
x1002
234D
Cinema
implementation
1600
x1541
234C
Weather
dp
,
implementation
1300
x5565
234B
Reading
sortings
1000
x7135
234A
Lefthanders and Righthanders
implementation
1200
x4476
233B
Non-square Equation
binary search
,
brute force
,
math
1400
x7542
233A
Perfect Permutation
implementation
,
math
800
x42990
232E
Quick Tortoise
bitmasks
,
divide and conquer
,
dp
3000
x697
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x475
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x291
232B
Table
bitmasks
,
combinatorics
,
dp
,
math
1900
x1479
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2550
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1908
231D
Magic Box
brute force
,
geometry
1600
x4109
231C
To Add or Not to Add
binary search
,
sortings
,
two pointers
1600
x8685
231B
Magic, Wizardry and Wonders
constructive algorithms
,
greedy
1500
x3624
231A
Team
brute force
,
greedy
800
x332791
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x76702
230A
Dragons
greedy
,
sortings
1000
x80292
229E
Gifts
combinatorics
,
dp
,
math
,
probabilities
2600
x466
229D
Towers
dp
,
greedy
,
two pointers
2100
x2277
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1630
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4726
229A
Shifts
brute force
,
two pointers
1500
x3529
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2479
228D
Zigzag
data structures
2100
x386
228C
Fractal Detector
dp
,
hashing
2000
x455
228B
Two Tables
brute force
,
implementation
1400
x3469
228A
Is your horseshoe on the other hoof?
implementation
800
x111997
227B
Effective Approach
implementation
1100
x28306
227A
Where do I Turn?
geometry
1300
x4223
226E
Noble Knight's Path
data structures
,
trees
2900
x462
226D
The table
constructive algorithms
,
greedy
2100
x967
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x914
226B
Naughty Stone Piles
greedy
1900
x1566
226A
Flying Saucer Segments
math
1400
x4011
225E
Unsolvable
math
,
number theory
2100
x806
225D
Snake
bitmasks
,
dfs and similar
,
graphs
,
implementation
2200
x949
225C
Barcode
dp
,
matrices
1700
x9216
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3163
225A
Dice Tower
constructive algorithms
,
greedy
1100
x11785
224B
Array
bitmasks
,
implementation
,
two pointers
1500
x7357
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x26977
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x191
223D
Spider
geometry
,
graphs
3000
x70
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1568
223B
Two Strings
data structures
,
dp
,
strings
1900
x1815
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2541
222E
Decoding Genome
dp
,
matrices
1900
x2830
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2173
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2264
222B
Cosmic Tables
data structures
,
implementation
1300
x6137
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10842
221B
Little Elephant and Numbers
implementation
1300
x4588
221A
Little Elephant and Function
implementation
,
math
1000
x15308
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1416
220D
Little Elephant and Triangle
geometry
,
math
2500
x286
220C
Little Elephant and Shifts
data structures
2100
x945
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x10411
220A
Little Elephant and Problem
implementation
,
sortings
1300
x12022
219E
Parking Lot
data structures
2200
x620
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x9645
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6677
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5833
219A
k-String
implementation
,
strings
1000
x28081
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