Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
19:54:09
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
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
126C
E-reader Display
constructive algorithms
,
greedy
2000
x715
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x18531
126A
Hot Bath
binary search
,
brute force
,
math
1900
x1423
125E
MST Company
binary search
,
graphs
2400
x1040
125D
Two progressions
constructive algorithms
,
greedy
2200
x394
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x702
123D
String
string suffix structures
2300
x1191
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x597
123B
Squares
math
1800
x1104
121E
Lucky Array
data structures
2400
x1679
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x273
121C
Lucky Permutation
brute force
,
combinatorics
,
number theory
1900
x1274
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x910
120I
Luck is in Numbers
greedy
2200
x303
120H
Brevity is Soul of Wit
graph matchings
1800
x1363
120G
Boom
implementation
1800
x684
119E
Alternative Reality
geometry
2400
x94
119D
String Transformation
hashing
,
strings
2500
x481
119C
Education Reform
dp
2000
x879
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1071
118E
Bertown roads
dfs and similar
,
graphs
2000
x6319
118D
Caesar's Legions
dp
1700
x17046
118C
Fancy Number
brute force
,
greedy
,
sortings
,
strings
1900
x2556
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x317
117D
Not Quick Transformation
divide and conquer
,
math
2500
x332
117C
Cycle
dfs and similar
,
graphs
2000
x2576
117B
Very Interesting Game
brute force
,
number theory
1800
x1547
115E
Linear Kingdom Races
data structures
,
dp
2400
x1419
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x379
115C
Plumber
math
2200
x589
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x118
113D
Museum
math
,
matrices
,
probabilities
2700
x656
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1216
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2762
111E
Petya and Rectangle
2900
x65
111D
Petya and Coloring
combinatorics
,
dp
2300
x727
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1314
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3616
109E
Lucky Interval
brute force
,
math
2700
x101
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x659
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3282
109B
Lucky Probability
brute force
,
probabilities
1900
x1392
107E
Darts
geometry
,
probabilities
2700
x128
107D
Crime Management
dp
,
graphs
,
matrices
2400
x402
107C
Arrangement
bitmasks
,
dp
2400
x364
106E
Space Rescuers
geometry
,
ternary search
2100
x852
106D
Treasure Island
brute force
,
implementation
1700
x1305
106C
Buns
dp
1700
x5830
105E
Lift and Throw
brute force
2500
x184
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x136
105C
Item World
brute force
,
implementation
,
sortings
2200
x329
105B
Dark Assembly
brute force
,
probabilities
1800
x806
105A
Transmigration
implementation
1700
x1824
103E
Buying Sets
flows
,
graph matchings
2900
x844
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2037
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x939
101E
Candies and Stones
divide and conquer
,
dp
2500
x480
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x674
101C
Vectors
implementation
,
math
2000
x690
101B
Buses
binary search
,
data structures
,
dp
1700
x2525
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x61
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x75
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x110
100F
Polynom
*special problem
,
implementation
1800
x133
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x466
98D
Help Monks
constructive algorithms
2500
x182
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x303
98B
Help King
implementation
,
probabilities
,
trees
2200
x118
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1176
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x375
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x243
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x302
97B
Superset
constructive algorithms
,
divide and conquer
2300
x811
97A
Domino
brute force
,
implementation
2400
x258
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1425
95D
Horse Races
dp
,
math
2500
x420
95C
Volleyball
shortest paths
1900
x2726
95B
Lucky Numbers
dp
,
greedy
1800
x1186
93E
Lostborn
dp
,
math
,
number theory
2600
x456
93D
Flags
dp
,
math
,
matrices
2500
x337
93C
Azembler
brute force
,
implementation
2500
x413
93B
End of Exams
greedy
1900
x906
93A
Frames
implementation
1700
x1920
91E
Igloo Skyscraper
data structures
,
geometry
2500
x591
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x264
91C
Ski Base
combinatorics
,
dsu
,
graphs
2300
x868
89E
Fire and Ice
greedy
2900
x99
89D
Space mines
geometry
2500
x231
89C
Chip Play
brute force
,
data structures
,
implementation
2300
x614
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x513
89A
Robbery
greedy
1800
x1464
87E
Mogohu-Rea Idol
geometry
2600
x556
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x861
87C
Interesting Game
dp
,
games
,
math
2000
x1315
87B
Vasya and Types
implementation
,
strings
1800
x1122
86E
Long sequence
brute force
,
math
,
matrices
2700
x180
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x13097
86C
Genetic engineering
dp
,
string suffix structures
,
trees
2500
x691
86B
Tetris revisited
constructive algorithms
,
graph matchings
,
greedy
,
math
2200
x402
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x939
←
1
2
...
50
51
52
53
54
55
→
User lists
Name