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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
27:39:11
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Difficulty:
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x250
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x580
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x197
164C
Machine Programming
flows
,
graphs
2400
x901
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1018
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2791
156D
Clues
combinatorics
,
graphs
2500
x1596
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2870
152E
Garden
bitmasks
,
dp
,
graphs
,
trees
2500
x487
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x4214
147B
Smile House
binary search
,
graphs
,
matrices
2500
x789
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4026
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x1100
141D
Take-off Ramps
graphs
,
shortest paths
2300
x900
134C
Swaps
constructive algorithms
,
graphs
,
greedy
2200
x475
132E
Bits of merry old England
flows
,
graphs
2700
x533
131D
Subway
dfs and similar
,
graphs
1600
x4701
129B
Students and Shoelaces
brute force
,
dfs and similar
,
graphs
,
implementation
1200
x12361
125E
MST Company
binary search
,
graphs
2400
x1095
118E
Bertown roads
dfs and similar
,
graphs
2000
x6756
117C
Cycle
dfs and similar
,
graphs
2000
x2648
115A
Party
dfs and similar
,
graphs
,
trees
900
x34985
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3717
107D
Crime Management
dp
,
graphs
,
matrices
2400
x426
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5122
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8983
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x383
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x303
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1515
94B
Friends
graphs
,
implementation
,
math
1300
x4703
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x272
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x886
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x525
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x909
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x959
83C
Track
graphs
,
greedy
,
shortest paths
2400
x432
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x350
78E
Evacuation
flows
,
graphs
,
shortest paths
2300
x580
76A
Gift
dsu
,
graphs
,
sortings
,
trees
2200
x1609
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x1290
73D
FreeDiv
dfs and similar
,
graphs
,
greedy
2200
x643
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2123
62D
Wormhouse
dfs and similar
,
graphs
2300
x374
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6623
59E
Shortest Path
graphs
,
shortest paths
2000
x3479
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x629
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x410
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x588
46F
Hercule Poirot Problem
dsu
,
graphs
2300
x330
45H
Road Problem
graphs
2100
x193
44F
BerPaint
geometry
,
graphs
2700
x68
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x206
41E
3-cycles
constructive algorithms
,
graphs
,
greedy
1900
x1978
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x622
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x534
34D
Road Map
dfs and similar
,
graphs
1600
x5225
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1216
29E
Quarrel
graphs
,
shortest paths
2400
x928
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x5007
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4720
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2550
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x11569
25C
Roads in Berland
graphs
,
shortest paths
1900
x6396
24A
Ring road
graphs
1400
x5243
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3378
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1672
22C
System Administrator
graphs
1700
x3150
21D
Traveling Graph
bitmasks
,
graph matchings
,
graphs
2400
x908
20C
Dijkstra?
graphs
,
shortest paths
1900
x33401
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4600
11D
A Simple Task
bitmasks
,
dp
,
graphs
2200
x4966
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x1050
8E
Beads
dp
,
graphs
2600
x697
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4387
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