Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round (Div. 2)
3 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
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
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x523
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x692
195B
After Training
data structures
,
implementation
,
math
1300
x5145
193D
Two Segments
data structures
2900
x389
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x817
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6910
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1462
187E
Heaven Tour
data structures
,
greedy
2900
x96
187D
BRT Contract
data structures
2800
x503
185E
Soap Time! - 2
binary search
,
data structures
3000
x104
182C
Optimal Sum
data structures
,
greedy
2000
x713
177D2
Encrypting Messages
data structures
1500
x1829
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1086
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x65
174C
Range Increments
data structures
,
greedy
1800
x1073
173E
Camping Groups
data structures
,
sortings
2600
x539
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x192
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1602
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1549
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x579
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x994
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2940
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8995
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2199
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x814
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x638
145E
Lucky Queries
data structures
2400
x2988
145D
Lucky Pair
combinatorics
,
data structures
,
implementation
2900
x242
144E
Competition
data structures
,
greedy
2200
x569
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3846
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4228
138C
Mushroom Gnomes - 2
binary search
,
data structures
,
probabilities
,
sortings
2200
x847
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1199
121E
Lucky Array
data structures
2400
x1662
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x317
115E
Linear Kingdom Races
data structures
,
dp
2400
x1398
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2757
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3578
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2005
101B
Buses
binary search
,
data structures
,
dp
1700
x2521
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x110
91E
Igloo Skyscraper
data structures
,
geometry
2500
x588
91B
Queue
binary search
,
data structures
1500
x6625
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x610
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x13004
85D
Sum of Medians
binary search
,
brute force
,
data structures
,
implementation
2300
x1942
85B
Embassy Queue
data structures
,
greedy
1800
x962
82C
General Mobilization
data structures
,
dfs and similar
,
sortings
2000
x802
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1740
76F
Tourist
binary search
,
data structures
,
dp
2300
x614
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1755
74D
Hanger
data structures
2400
x365
70D
Professor's task
data structures
,
geometry
2700
x968
70C
Lucky Tickets
binary search
,
data structures
,
sortings
,
two pointers
2200
x562
69E
Subsegments
data structures
,
implementation
1800
x4061
68D
Half-decay tree
data structures
,
divide and conquer
,
dp
,
math
,
probabilities
2500
x452
67D
Optical Experiment
binary search
,
data structures
,
dp
1900
x1347
66E
Petya and Post
data structures
,
dp
2000
x687
66C
Petya and File System
data structures
,
implementation
1800
x1002
61E
Enemy is weak
data structures
,
trees
1900
x10435
56E
Domino Principle
binary search
,
data structures
,
sortings
2200
x2255
56C
Corporation Mail
data structures
,
expression parsing
,
implementation
1700
x1128
52C
Circular RMQ
data structures
2200
x8509
47E
Cannon
data structures
,
geometry
,
sortings
2200
x358
46E
Comb
data structures
,
dp
1900
x931
46D
Parking Lot
data structures
,
implementation
1800
x965
45C
Dancing Lessons
data structures
1900
x864
44G
Shooting Gallery
data structures
,
implementation
2500
x373
38G
Queue
data structures
2300
x686
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1603
35E
Parade
data structures
,
sortings
2100
x711
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x688
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4682
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x592
19D
Points
data structures
2800
x2192
18C
Stripe
data structures
,
implementation
1200
x12693
15D
Map
data structures
,
implementation
,
sortings
2500
x730
13E
Holes
data structures
,
dsu
2700
x5512
12D
Ball
data structures
,
sortings
2400
x2189
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3175
5E
Bindian Signalizing
data structures
2400
x2049
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x13139
4C
Registration System
data structures
,
hashing
,
implementation
1300
x79503
←
1
2
...
15
16
17
→
User lists
Name