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Codeforces Round (Div. 2)
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data structures
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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
367A
Sereja and Algorithm
data structures
,
implementation
1500
x4296
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1356
364A
Matrix
combinatorics
,
data structures
,
implementation
1600
x4632
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x193
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x912
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1670
359D
Pair of Numbers
binary search
,
brute force
,
data structures
,
math
,
two pointers
2000
x4945
356A
Knight Tournament
data structures
,
dsu
1500
x13100
351D
Jeff and Removing Periods
data structures
2700
x1022
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x258
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13596
348C
Subset Sums
brute force
,
data structures
2500
x2126
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5589
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13318
342E
Xenia and Tree
data structures
,
divide and conquer
,
trees
2400
x7835
341D
Iahub and Xors
data structures
2500
x1167
340D
Bubble Sort Graph
binary search
,
data structures
,
dp
1500
x7084
339D
Xenia and Bit Operations
data structures
,
trees
1700
x24342
338E
Optimize!
data structures
2600
x959
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x899
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x7870
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x175
331B2
Shave Beaver!
data structures
1900
x674
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1391
323C
Two permutations
data structures
2400
x578
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x4730
319E
Ping-Pong
data structures
3000
x635
319B
Psychos in a Line
data structures
,
implementation
1900
x4055
316E3
Summer Homework
data structures
,
math
2300
x509
316E2
Summer Homework
data structures
,
math
2300
x384
316E1
Summer Homework
brute force
,
data structures
1500
x1455
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x518
314C
Sereja and Subsequences
data structures
,
dp
2000
x1813
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x542
311D
Interval Cubing
data structures
,
math
2600
x660
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x477
311B
Cats Transport
data structures
,
dp
2400
x3296
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x439
301D
Yaroslav and Divisors
data structures
2200
x2239
297E
Mystic Carvings
data structures
3000
x354
295E
Yaroslav and Points
data structures
2500
x656
295A
Greg and Array
data structures
,
implementation
1400
x16552
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x1327
292E
Copying Data
data structures
1900
x3997
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2356
286D
Tourists
data structures
,
sortings
2600
x373
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x726
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6513
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3491
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x203
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1226
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4467
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1569
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x24913
274E
Mirror Room
data structures
,
implementation
3000
x306
272C
Dima and Staircase
data structures
,
implementation
1500
x6712
271D
Good Substrings
data structures
,
strings
1800
x10668
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4094
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x433
266E
More Queries to Array...
data structures
,
math
2500
x770
264E
Roadside Trees
data structures
,
dp
3000
x398
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10663
263E
Rhombus
brute force
,
data structures
,
dp
2500
x397
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x453
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1043
257E
Greedy Elevator
data structures
,
implementation
2200
x277
256E
Lucky Arrays
data structures
2400
x656
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x523
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2551
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x399
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x3039
243E
Matrix
data structures
3000
x172
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x211
242E
XOR on Segment
bitmasks
,
data structures
2000
x8658
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x759
240F
TorCoder
data structures
2600
x1820
238D
Tape Programming
data structures
,
implementation
2900
x246
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2045
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x444
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1628
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4523
228D
Zigzag
data structures
2100
x377
226E
Noble Knight's Path
data structures
,
trees
2900
x450
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x850
223B
Two Strings
data structures
,
dp
,
strings
1900
x1740
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2491
222B
Cosmic Tables
data structures
,
implementation
1300
x6017
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1344
220C
Little Elephant and Shifts
data structures
2100
x928
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9628
219E
Parking Lot
data structures
2200
x604
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x296
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x777
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x461
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6256
207C3
Game with Two Trees
data structures
2700
x119
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1124
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5076
200A
Cinema
brute force
,
data structures
2400
x672
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x405
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