Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 2)
5 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
data structures
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
339D
Xenia and Bit Operations
data structures
,
trees
1700
x35114
338E
Optimize!
data structures
2600
x1242
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x1097
332B
Maximum Absurdity
data structures
,
dp
,
implementation
1500
x8901
331D3
Escaping on Beaveractor
data structures
,
implementation
,
trees
3000
x210
331B2
Shave Beaver!
data structures
1900
x851
331A2
Oh Sweet Beaverette
data structures
,
sortings
1500
x1573
323C
Two permutations
data structures
2400
x722
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x6892
319E
Ping-Pong
data structures
3000
x822
319B
Psychos in a Line
data structures
,
implementation
1900
x4953
316E3
Summer Homework
data structures
,
math
2300
x592
316E2
Summer Homework
data structures
,
math
2300
x439
316E1
Summer Homework
brute force
,
data structures
1500
x1565
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x627
314C
Sereja and Subsequences
data structures
,
dp
2000
x2105
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x638
311D
Interval Cubing
data structures
,
math
2600
x840
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x608
311B
Cats Transport
data structures
,
dp
2400
x4592
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x537
301D
Yaroslav and Divisors
data structures
2200
x3247
297E
Mystic Carvings
data structures
3000
x461
295E
Yaroslav and Points
data structures
2500
x883
295A
Greg and Array
data structures
,
implementation
1400
x28515
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x2212
292E
Copying Data
data structures
1900
x5164
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2870
286D
Tourists
data structures
,
sortings
2600
x503
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x963
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6949
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x4836
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x353
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1810
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x5425
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1976
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x44133
274E
Mirror Room
data structures
,
implementation
3000
x433
272C
Dima and Staircase
data structures
,
implementation
1500
x7294
271D
Good Substrings
data structures
,
strings
1800
x15030
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4497
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x537
266E
More Queries to Array...
data structures
,
math
2500
x1194
264E
Roadside Trees
data structures
,
dp
3000
x488
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x11961
263E
Rhombus
brute force
,
data structures
,
dp
2500
x457
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x552
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1480
257E
Greedy Elevator
data structures
,
implementation
2200
x376
256E
Lucky Arrays
data structures
2400
x823
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x619
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2969
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x608
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x4946
243E
Matrix
data structures
3000
x291
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x261
242E
XOR on Segment
bitmasks
,
data structures
2000
x12888
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x1062
240F
TorCoder
data structures
2600
x2378
238D
Tape Programming
data structures
,
implementation
2900
x281
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2651
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x586
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x2447
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x6119
228D
Zigzag
data structures
2100
x467
226E
Noble Knight's Path
data structures
,
trees
2900
x675
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x1056
223B
Two Strings
data structures
,
dp
,
strings
1900
x2050
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2974
222B
Cosmic Tables
data structures
,
implementation
1300
x6661
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1818
220C
Little Elephant and Shifts
data structures
2100
x1070
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x13791
219E
Parking Lot
data structures
2200
x733
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x367
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x1043
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x691
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x9974
207C3
Game with Two Trees
data structures
2700
x167
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1741
204B
Little Elephant and Cards
binary search
,
data structures
1500
x6058
200A
Cinema
brute force
,
data structures
2400
x769
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x596
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x672
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x940
195B
After Training
data structures
,
implementation
,
math
1300
x5567
193D
Two Segments
data structures
2900
x684
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x998
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x10194
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1846
187E
Heaven Tour
data structures
,
greedy
2900
x124
187D
BRT Contract
data structures
2800
x631
185E
Soap Time! - 2
binary search
,
data structures
3000
x272
182C
Optimal Sum
data structures
,
greedy
2000
x906
177D2
Encrypting Messages
data structures
1500
x2886
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1751
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x103
174C
Range Increments
data structures
,
greedy
1800
x1284
173E
Camping Groups
data structures
,
sortings
2600
x789
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x323
←
1
2
...
18
19
20
21
→
User lists
Name