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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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graphs
combine-tags-by-or
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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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Custom test
Problems
#
Name
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10143
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x10395
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11077
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11080
601A
The Two Routes
graphs
,
shortest paths
1600
x11467
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12330
1702E
Split Into Two Sets
dfs and similar
,
dsu
,
graphs
1600
x12422
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x15193
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2448
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2455
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2537
350B
Resort
graphs
1500
x3087
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3540
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3585
1147A
Hide and Seek
graphs
1500
x5147
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5703
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6122
930A
Peculiar apple-tree
dfs and similar
,
graphs
,
trees
1500
x6810
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7101
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7614
744A
Hongcow Builds A Nation
dfs and similar
,
graphs
1500
x7927
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8540
1169B
Pairs
graphs
,
implementation
1500
x9480
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x9492
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10865
1139C
Edgy Trees
dfs and similar
,
dsu
,
graphs
,
math
,
trees
1500
x12070
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x12112
1263D
Secret Passwords
dfs and similar
,
dsu
,
graphs
1500
x13320
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13719
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13794
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13964
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14566
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14662
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x15000
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15953
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18309
977E
Cyclic Components
dfs and similar
,
dsu
,
graphs
1500
x19337
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39960
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4081
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4303
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4609
24A
Ring road
graphs
1400
x4788
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4956
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8252
1764C
Doremy's City Construction
graphs
,
greedy
1400
x9077
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9194
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9534
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9598
1893A
Anonymous Informant
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x11331
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12112
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12195
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12518
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13266
437C
The Child and Toy
graphs
,
greedy
,
sortings
1400
x13531
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13701
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15458
1548A
Web of Lies
brute force
,
graphs
,
greedy
1400
x16047
1167C
News Distribution
dfs and similar
,
dsu
,
graphs
1400
x17123
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x20032
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x48144
94B
Friends
graphs
,
implementation
,
math
1300
x4507
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8284
1065B
Vasya and Isolated Vertices
constructive algorithms
,
graphs
1300
x10770
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11715
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x11863
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12092
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12520
1675D
Vertical Paths
graphs
,
implementation
,
trees
1300
x12606
707B
Bakery
graphs
1300
x12768
1711B
Party
brute force
,
graphs
1300
x13140
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14287
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14388
1741D
Masha and a Beautiful Tree
dfs and similar
,
divide and conquer
,
graphs
,
sortings
,
trees
1300
x14533
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14607
862B
Mahmoud and Ehab and the bipartiteness
dfs and similar
,
graphs
,
trees
1300
x16062
1829F
Forever Winter
dfs and similar
,
graphs
,
math
1300
x16266
330B
Road Construction
constructive algorithms
,
graphs
1300
x16386
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x17038
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21753
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24469
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5283
292B
Network Topology
graphs
,
implementation
1200
x7720
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8690
1581B
Diameter of Graph
constructive algorithms
,
graphs
,
greedy
,
math
1200
x11057
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x11724
1428B
Belted Rooms
graphs
,
implementation
1200
x14189
1647B
Madoka and the Elegant Gift
brute force
,
constructive algorithms
,
graphs
,
implementation
1200
x15090
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15740
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18323
1559C
Mocha and Hiking
constructive algorithms
,
graphs
1200
x19773
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20450
648C
Путь Робота
constructive algorithms
,
dfs and similar
,
graphs
1100
x847
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x9935
1255B
Fridge Lockers
graphs
,
implementation
1100
x11689
1829E
The Lakes
dfs and similar
,
dsu
,
graphs
,
implementation
1100
x18330
1472C
Long Jumps
dp
,
graphs
1100
x30132
1033A
King Escape
dfs and similar
,
graphs
,
implementation
1000
x12993
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20250
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50419
1055A
Metro
graphs
900
x10397
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