Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rayan
→ Pay attention
Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
33:29:13
Register now »
→ 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
185B
Mushroom Scientists
math
,
ternary search
1800
x1670
185A
Plant
math
1300
x5978
183E
Candy Shop
greedy
2900
x140
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x406
183C
Cyclic Coloring
dfs and similar
2200
x645
183B
Zoo
brute force
,
geometry
1700
x700
183A
Headquarters
constructive algorithms
,
math
1700
x552
182E
Wooden Fence
dp
1800
x1466
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8153
182C
Optimal Sum
data structures
,
greedy
2000
x746
182B
Vasya's Calendar
implementation
1000
x6969
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x290
181B
Number of Triplets
binary search
,
brute force
1300
x3069
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x7337
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2542
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1796
180D
Name
greedy
,
strings
1900
x733
180C
Letter
dp
1400
x7535
180B
Divisibility Rules
math
,
number theory
2300
x355
180A
Defragmentation
implementation
1800
x550
178F3
Representative Sampling
2500
x438
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x355
178F1
Representative Sampling
1800
x408
178E3
The Beaver's Problem - 2
2300
x202
178E2
The Beaver's Problem - 2
2000
x233
178E1
The Beaver's Problem - 2
1900
x292
178D3
Magic Squares
2100
x250
178D2
Magic Squares
1900
x273
178D1
Magic Squares
1500
x648
178C3
Smart Beaver and Resolving Collisions
2000
x328
178C2
Smart Beaver and Resolving Collisions
1900
x310
178C1
Smart Beaver and Resolving Collisions
1600
x496
178B3
Greedy Merchants
1800
x1241
178B2
Greedy Merchants
1600
x683
178B1
Greedy Merchants
1600
x771
178A3
Educational Game
greedy
1100
x1463
178A2
Educational Game
greedy
1000
x1657
178A1
Educational Game
1000
x1638
177G2
Fibonacci Strings
matrices
,
strings
2600
x206
177G1
Fibonacci Strings
strings
2400
x189
177F2
Script Generation
2300
x211
177F1
Script Generation
1800
x306
177E2
Space Voyage
binary search
1900
x436
177E1
Space Voyage
binary search
1700
x623
177D2
Encrypting Messages
data structures
1500
x2045
177D1
Encrypting Messages
brute force
1200
x2196
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2603
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2603
177B2
Rectangular Game
number theory
1200
x3059
177B1
Rectangular Game
number theory
1000
x4217
177A2
Good Matrix Elements
implementation
800
x7429
177A1
Good Matrix Elements
implementation
800
x8845
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1210
176D
Hyper String
dp
2500
x327
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x485
176B
Word Cut
dp
1700
x1868
176A
Trading Business
greedy
,
sortings
1200
x1518
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x66
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x266
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x299
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1328
175B
Plane of Tanks: Pro
implementation
1400
x1433
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2418
174C
Range Increments
data structures
,
greedy
1800
x1158
174B
File List
dp
,
greedy
,
implementation
1400
x2295
174A
Problem About Equation
math
1100
x2980
173E
Camping Groups
data structures
,
sortings
2600
x570
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x253
173C
Spiral Maximum
brute force
,
dp
1900
x996
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x3242
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2326
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x271
172D
Calendar Reform
*special problem
,
number theory
1500
x1404
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1149
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2796
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x6204
171H
A polyline
*special problem
,
implementation
1700
x285
171G
Mysterious numbers - 2
*special problem
1600
x938
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1289
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1474
171D
Broken checker
*special problem
,
brute force
1300
x2590
171C
A Piece of Cake
*special problem
,
implementation
2000
x1099
171B
Star
*special problem
,
combinatorics
1300
x4085
171A
Mysterious numbers - 1
*special problem
,
constructive algorithms
1200
x4511
169B
Replacing Digits
greedy
1100
x3336
169A
Chores
sortings
800
x7036
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1224
168A
Wizards and Demonstration
implementation
,
math
900
x10673
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x581
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x198
167C
Wizards and Numbers
games
,
math
2300
x678
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2177
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2047
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21602
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x365
166C
Median
greedy
,
math
,
sortings
1500
x6557
166B
Polygons
geometry
,
sortings
2100
x2541
166A
Rank List
binary search
,
implementation
,
sortings
1100
x18007
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x7084
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1690
←
1
2
...
91
92
93
94
95
...
100
101
→
User lists
Name