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Kotlin Heroes: Practice 6
23:19:16
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
24:19:16
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dfs and similar
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
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shortest paths
sortings
string suffix structures
strings
ternary search
trees
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Problems
#
Name
1446E
Long Recovery
constructive algorithms
,
dfs and similar
3500
x38
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x52
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x96
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x64
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x70
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x98
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x120
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x130
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x140
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x141
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x224
1307F
Cow and Vacation
dfs and similar
,
dsu
,
trees
3300
x280
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x182
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x306
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x364
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x795
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x86
521E
Cycling City
dfs and similar
,
graphs
3100
x437
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x506
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x74
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x86
1178G
The Awesomest Vertex
data structures
,
dfs and similar
3000
x181
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x188
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x211
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
math
,
trees
3000
x222
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x230
1361E
James and the Chase
dfs and similar
,
graphs
,
probabilities
,
trees
3000
x234
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x332
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x334
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x401
65E
Harry Potter and Moving Staircases
dfs and similar
,
implementation
2900
x53
1218H
Function Composition
dfs and similar
2900
x64
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x137
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x163
1266F
Almost Same Distance
dfs and similar
,
graphs
2900
x198
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x211
687E
TOF
dfs and similar
,
graphs
2900
x230
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x239
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x241
1062F
Upgrading Cities
dfs and similar
,
graphs
2900
x268
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x281
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x340
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x857
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x1095
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x79
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x123
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x192
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x207
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x252
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x255
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x256
348E
Pilgrims
dfs and similar
,
dp
,
trees
2800
x282
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x317
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x319
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x327
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x379
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x386
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x476
1404D
Game of Pairs
constructive algorithms
,
dfs and similar
,
interactive
,
math
,
number theory
2800
x509
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x695
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x731
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1043
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x1130
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x1165
982F
The Meeting Place Cannot Be Changed
dfs and similar
,
graphs
2700
x129
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x149
1452G
Game On Tree
data structures
,
dfs and similar
,
greedy
,
trees
2700
x159
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x192
475E
Strongly Connected City 2
dfs and similar
2700
x244
1036G
Sources and Sinks
bitmasks
,
brute force
,
dfs and similar
2700
x262
812D
Sagheer and Kindergarten
dfs and similar
,
graphs
,
implementation
,
trees
2700
x267
1118F2
Tree Cutting (Hard Version)
combinatorics
,
dfs and similar
,
dp
,
trees
2700
x274
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x275
860E
Arkady and a Nobody-men
data structures
,
dfs and similar
,
trees
2700
x306
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x424
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x433
494D
Birthday
data structures
,
dfs and similar
,
dp
,
trees
2700
x436
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x452
864F
Cities Excursions
dfs and similar
,
graphs
,
trees
2700
x456
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x493
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x502
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x542
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x646
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x871
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x920
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x1144
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x129
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x234
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x260
1486F
Pairs of Paths
combinatorics
,
data structures
,
dfs and similar
,
dp
,
trees
2600
x287
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x304
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x334
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x405
1016F
Road Projects
dfs and similar
,
dp
,
trees
2600
x492
1312G
Autocompletion
data structures
,
dfs and similar
,
dp
2600
x515
633F
The Chocolate Spree
dfs and similar
,
dp
,
graphs
,
trees
2600
x520
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x536
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x538
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x542
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x571
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