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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
27:51:07
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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
#
Name
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2301
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x2411
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2532
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2560
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2577
960F
Pathwalks
data structures
,
dp
,
graphs
2100
x2637
1547G
How Many Paths?
dfs and similar
,
dp
,
graphs
,
trees
2100
x2735
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x2737
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2784
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2921
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3019
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3047
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3078
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3216
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3413
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3622
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3654
1000E
We Need More Bosses
dfs and similar
,
graphs
,
trees
2100
x3818
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3818
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3887
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x3996
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4054
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4064
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4344
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4783
1217D
Coloring Edges
constructive algorithms
,
dfs and similar
,
graphs
2100
x4903
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5038
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5318
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x5643
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6810
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x541
267B
Dominoes
dfs and similar
,
graphs
2000
x604
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x684
542C
Idempotent functions
constructive algorithms
,
graphs
,
math
2000
x1092
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1118
243B
Hydra
graphs
,
sortings
2000
x1169
1250N
Wires
dfs and similar
,
graphs
,
greedy
2000
x1538
237E
Build String
flows
,
graphs
2000
x1580
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1696
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1712
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1715
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1743
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1821
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1857
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x1857
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1886
666B
World Tour
graphs
,
shortest paths
2000
x2051
803E
Roma and Poker
dp
,
graphs
2000
x2078
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2108
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2123
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2188
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2291
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2299
1674G
Remove Directed Edges
dfs and similar
,
dp
,
graphs
2000
x2348
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2422
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2491
117C
Cycle
dfs and similar
,
graphs
2000
x2536
1941G
Rudolf and Subway
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2000
x2555
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2783
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2801
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2832
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x2880
1672F1
Array Shuffling
constructive algorithms
,
graphs
,
greedy
2000
x2929
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x2995
59E
Shortest Path
graphs
,
shortest paths
2000
x3044
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3074
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3145
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3222
1198C
Matching vs Independent Set
constructive algorithms
,
graphs
,
greedy
,
sortings
2000
x3230
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3351
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3387
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3510
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3629
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3745
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3926
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x3968
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4207
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4303
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4324
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4333
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4363
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4475
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4726
1613E
Crazy Robot
dfs and similar
,
graphs
2000
x4948
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x4954
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x4972
1454E
Number of Simple Paths
combinatorics
,
dfs and similar
,
graphs
,
trees
2000
x5446
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x5745
118E
Bertown roads
dfs and similar
,
graphs
2000
x5850
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6083
999E
Reachability from the Capital
dfs and similar
,
graphs
,
greedy
2000
x6283
1385E
Directing Edges
constructive algorithms
,
dfs and similar
,
graphs
2000
x6667
449B
Jzzhu and Cities
graphs
,
greedy
,
shortest paths
2000
x7804
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x878
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1184
883G
Orientation of Edges
dfs and similar
,
graphs
1900
x1379
1184E1
Daleks' Invasion (easy)
graphs
,
trees
1900
x1540
229C
Triangles
combinatorics
,
graphs
,
math
1900
x1582
1423B
Valuable Paper
binary search
,
flows
,
graph matchings
,
graphs
1900
x1733
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1766
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