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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
39:00:53
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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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Problems
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Custom test
Problems
#
Name
1832F
Zombies
binary search
,
dp
3200
x246
960H
Santa's Gift
data structures
,
trees
3100
x246
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x245
62C
Inquisition
geometry
,
implementation
,
sortings
2300
x244
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x243
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x243
607E
Cross Sum
binary search
,
geometry
3300
x242
238D
Tape Programming
data structures
,
implementation
2900
x242
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x242
1874E
Jellyfish and Hack
dp
,
math
3000
x241
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x241
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x241
1767F
Two Subtrees
data structures
,
trees
3100
x241
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x241
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x240
1864G
Magic Square
combinatorics
,
constructive algorithms
,
implementation
3100
x238
1065G
Fibonacci Suffix
strings
2700
x238
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x238
1743G
Antifibonacci Cut
bitmasks
,
combinatorics
,
constructive algorithms
,
data structures
,
dp
,
hashing
,
math
3000
x237
1510E
Equilibrium Point /\textbackslash/\textbackslash
2700
x237
152D
Frames
brute force
2600
x237
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x236
1357A5
Distinguish Rz(θ) from Ry(θ)
x236
40C
Berland Square
implementation
,
math
2300
x236
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x235
1812I
Mountain Climber
*special problem
x235
1148H
Holy Diver
data structures
3500
x235
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x235
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x235
802E
Marmots (medium)
math
2200
x235
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x235
1572F
Stations
data structures
3400
x234
1147F
Zigzag Game
games
,
interactive
3500
x234
575E
Spectator Riots
geometry
2800
x234
178D3
Magic Squares
2100
x234
346E
Doodle Jump
math
,
number theory
3000
x233
1616G
Just Add an Edge
dfs and similar
,
dp
,
graphs
3500
x232
1523H
Hopping Around the Array
data structures
,
dp
3500
x232
1240F
Football
graphs
3100
x232
1197F
Coloring Game
dp
,
games
,
matrices
2700
x232
1193A
Amusement Park
*special problem
,
dp
,
math
x232
1575M
Managing Telephone Poles
data structures
,
geometry
2400
x231
1474F
1 2 3 4 ...
dp
,
math
,
matrices
3000
x231
715D
Create a Maze
constructive algorithms
3100
x231
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x231
661F
Primes in Interval
*special problem
1900
x230
470C
Eval
*special problem
1900
x230
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x228
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x228
164D
Minimum Diameter
binary search
,
brute force
3100
x228
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x228
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x228
1116D2
Pattern of increasing blocks
x227
1115U2
Chessboard unitary
*special problem
1600
x227
370E
Summer Reading
dp
,
greedy
2500
x227
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x226
883L
Berland.Taxi
data structures
2500
x226
1338E
JYPnation
graphs
3500
x225
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x225
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x225
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x225
406E
Hamming Triples
implementation
,
math
,
two pointers
2800
x225
178E2
The Beaver's Problem - 2
2000
x225
1425I
Impressive Harvesting of The Orchard
data structures
2800
x224
1115G3
Palindrome checker oracle
*special problem
1600
x224
89D
Space mines
geometry
2500
x224
475F
Meta-universe
data structures
2900
x223
162D
Remove digits
*special problem
1900
x223
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x222
1086F
Forest Fires
math
3500
x222
1083D
The Fair Nut's getting crazy
data structures
,
implementation
3500
x222
952G
Puzzling Language
constructive algorithms
2200
x222
661B
Seasons
*special problem
1900
x222
497D
Gears
brute force
,
geometry
,
math
2900
x222
1896G
Pepe Racing
constructive algorithms
,
implementation
,
interactive
,
sortings
3200
x221
1738H
Palindrome Addicts
data structures
,
strings
3300
x221
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x221
1188E
Problem from Red Panda
combinatorics
3300
x221
1515I
Phoenix and Diamonds
binary search
,
data structures
,
sortings
3400
x220
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x220
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x220
926F
Mobile Communications
2000
x220
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x220
435E
Special Graph
2500
x220
1450G
Communism
bitmasks
,
dp
,
trees
3500
x219
1750G
Doping
combinatorics
,
dp
,
math
3300
x218
207A2
Beaver's Calculator 1.0
greedy
1800
x218
1938L
XOR Operations
2800
x217
1830E
Bully Sort
data structures
,
math
3500
x217
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x217
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x216
774B
Significant Cups
*special problem
,
binary search
,
data structures
,
two pointers
2100
x216
309E
Sheep
binary search
,
greedy
2900
x216
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x215
1368H2
Breadboard Capacity (hard version)
3500
x215
331E2
Deja Vu
constructive algorithms
,
dp
3100
x215
82E
Corridor
geometry
2600
x215
1431E
Chess Match
*special problem
2000
x214
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x214
533D
Landmarks
data structures
,
dp
3000
x214
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