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Codeforces Round (Div. 2)
5 days
→ Filter Problems
Difficulty:
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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
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Status
Standings
Custom test
Problems
#
Name
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2139
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2119
222B
Cosmic Tables
data structures
,
implementation
1300
x6016
222A
Shooshuns and Sequence
brute force
,
implementation
1200
x10487
221B
Little Elephant and Numbers
implementation
1300
x4522
221A
Little Elephant and Function
implementation
,
math
1000
x14879
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1342
220D
Little Elephant and Triangle
geometry
,
math
2500
x276
220C
Little Elephant and Shifts
data structures
2100
x928
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9621
220A
Little Elephant and Problem
implementation
,
sortings
1300
x11865
219E
Parking Lot
data structures
2200
x604
219D
Choosing Capital for Treeland
dfs and similar
,
dp
,
graphs
,
trees
1700
x8846
219C
Color Stripe
brute force
,
dp
,
greedy
1600
x6583
219B
Special Offer! Super Price 999 Bourles!
implementation
1400
x5742
219A
k-String
implementation
,
strings
1000
x26650
218B
Airport
implementation
1100
x15982
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x9070
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x293
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x246
217C
Formurosa
divide and conquer
,
dp
,
expression parsing
2600
x313
217B
Blackboard Fibonacci
brute force
,
math
2100
x869
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20647
216E
Martian Luck
math
,
number theory
2000
x556
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1334
216C
Hiring Staff
greedy
1800
x1809
216B
Forming Teams
dfs and similar
,
implementation
1700
x6182
216A
Tiling with Hexagons
implementation
,
math
1200
x4945
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x543
215D
Hot Days
greedy
1900
x1579
215C
Crosses
brute force
,
implementation
2100
x653
215B
Olympic Medal
greedy
,
math
1300
x5424
215A
Bicycle Chain
brute force
,
implementation
900
x14138
214B
Hometask
brute force
,
constructive algorithms
,
greedy
,
math
1600
x4919
214A
System of Equations
brute force
800
x34211
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x776
213D
Stars
constructive algorithms
,
geometry
2300
x335
213C
Relay Race
dp
2000
x2769
213B
Numbers
combinatorics
,
dp
1900
x1668
213A
Game
dfs and similar
,
greedy
1700
x1693
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1688
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x459
212C
Cowboys
combinatorics
,
dp
,
math
2100
x377
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x329
212A
Privatization
flows
,
graphs
3000
x195
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x706
209B
Pixels
constructive algorithms
,
math
2100
x363
209A
Multicolored Marbles
dp
,
math
1600
x2279
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6247
208D
Prizes, Prizes, more Prizes
implementation
1200
x7514
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1794
208B
Solitaire
dfs and similar
,
dp
1900
x1347
208A
Dubstep
strings
900
x85340
207D9
The Beaver's Problem - 3
1800
x84
207D8
The Beaver's Problem - 3
2300
x89
207D7
The Beaver's Problem - 3
1600
x97
207D6
The Beaver's Problem - 3
2100
x80
207D5
The Beaver's Problem - 3
1600
x138
207D4
The Beaver's Problem - 3
2100
x149
207D3
The Beaver's Problem - 3
2000
x135
207D2
The Beaver's Problem - 3
2000
x104
207D10
The Beaver's Problem - 3
2100
x82
207D1
The Beaver's Problem - 3
1800
x117
207C3
Game with Two Trees
data structures
2700
x119
207C2
Game with Two Trees
2200
x79
207C1
Game with Two Trees
2100
x103
207B3
Military Trainings
1700
x161
207B2
Military Trainings
1900
x178
207B1
Military Trainings
1600
x260
207A3
Beaver's Calculator 1.0
greedy
2000
x204
207A2
Beaver's Calculator 1.0
greedy
1800
x226
207A1
Beaver's Calculator 1.0
greedy
1600
x277
205B
Little Elephant and Sorting
brute force
,
greedy
1400
x5968
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21849
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1123
204D
Little Elephant and Retro Strings
dp
2400
x444
204C
Little Elephant and Furik and Rubik
math
,
probabilities
2000
x1085
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5071
204A
Little Elephant and Interval
binary search
,
combinatorics
,
dp
1500
x5588
203E
Transportation
greedy
,
sortings
,
two pointers
2300
x277
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1404
203C
Photographer
greedy
,
sortings
1400
x5608
203B
Game on Paper
brute force
,
implementation
1300
x2563
203A
Two Problems
brute force
,
implementation
1200
x4122
202B
Brand New Easy Problem
brute force
1700
x811
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x16188
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x404
201D
Brand New Problem
bitmasks
,
brute force
,
dp
2600
x390
201C
Fragile Bridges
dp
2000
x1296
201B
Guess That Car!
math
,
ternary search
1800
x1255
201A
Clear Symmetry
constructive algorithms
,
dp
,
math
1700
x2977
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x336
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x897
200C
Football Championship
brute force
,
implementation
1800
x1033
200B
Drinks
implementation
,
math
800
x110447
200A
Cinema
brute force
,
data structures
2400
x667
199B
Special Olympics
geometry
1900
x786
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25597
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x405
198D
Cube Snake
constructive algorithms
2700
x105
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