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Codeforces Round 945 (Div. 2)
3 days
Register now »
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Difficulty:
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data structures
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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Custom test
Problems
#
Name
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x515
314C
Sereja and Subsequences
data structures
,
dp
2000
x1762
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x540
311D
Interval Cubing
data structures
,
math
2600
x659
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
311B
Cats Transport
data structures
,
dp
2400
x3225
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
301D
Yaroslav and Divisors
data structures
2200
x2207
297E
Mystic Carvings
data structures
3000
x353
295E
Yaroslav and Points
data structures
2500
x649
295A
Greg and Array
data structures
,
implementation
1400
x16097
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x1269
292E
Copying Data
data structures
1900
x3919
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2311
286D
Tourists
data structures
,
sortings
2600
x371
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x718
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6484
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3362
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x196
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1190
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4375
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1548
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x24067
274E
Mirror Room
data structures
,
implementation
3000
x302
272C
Dima and Staircase
data structures
,
implementation
1500
x6677
271D
Good Substrings
data structures
,
strings
1800
x10325
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4084
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x413
266E
More Queries to Array...
data structures
,
math
2500
x720
264E
Roadside Trees
data structures
,
dp
3000
x396
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10607
263E
Rhombus
brute force
,
data structures
,
dp
2500
x394
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x408
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1030
257E
Greedy Elevator
data structures
,
implementation
2200
x275
256E
Lucky Arrays
data structures
2400
x653
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x522
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2525
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x375
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2974
243E
Matrix
data structures
3000
x171
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x208
242E
XOR on Segment
bitmasks
,
data structures
2000
x8450
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x751
240F
TorCoder
data structures
2600
x1791
238D
Tape Programming
data structures
,
implementation
2900
x244
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2014
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x441
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1542
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4470
228D
Zigzag
data structures
2100
x374
226E
Noble Knight's Path
data structures
,
trees
2900
x433
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x844
223B
Two Strings
data structures
,
dp
,
strings
1900
x1720
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2483
222B
Cosmic Tables
data structures
,
implementation
1300
x5984
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1334
220C
Little Elephant and Shifts
data structures
2100
x923
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9434
219E
Parking Lot
data structures
2200
x602
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x290
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x770
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x451
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6104
207C3
Game with Two Trees
data structures
2700
x118
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1085
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5025
200A
Cinema
brute force
,
data structures
2400
x660
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x401
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x521
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x688
195B
After Training
data structures
,
implementation
,
math
1300
x5123
193D
Two Segments
data structures
2900
x388
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x805
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6743
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1439
187E
Heaven Tour
data structures
,
greedy
2900
x91
187D
BRT Contract
data structures
2800
x501
185E
Soap Time! - 2
binary search
,
data structures
3000
x103
182C
Optimal Sum
data structures
,
greedy
2000
x709
177D2
Encrypting Messages
data structures
1500
x1779
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1027
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
174C
Range Increments
data structures
,
greedy
1800
x1069
173E
Camping Groups
data structures
,
sortings
2600
x535
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x190
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1585
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1527
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x988
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2921
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8883
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2188
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x789
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x629
145E
Lucky Queries
data structures
2400
x2912
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x238
144E
Competition
data structures
,
greedy
2200
x562
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3790
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4202
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