Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Rayan
→ Pay attention
Before contest
Codeforces Round 998 (Div. 3)
00:17:54
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
194B
Square
math
1200
x3590
194A
Exams
implementation
,
math
900
x10012
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x345
193D
Two Segments
data structures
2900
x562
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x517
193B
Xor
brute force
2000
x1021
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x4071
192B
Walking in the Rain
brute force
,
implementation
1100
x6338
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10516
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x868
191D
Metro Scheme
graphs
,
greedy
2700
x365
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x7433
191B
Demonstration
greedy
1700
x1016
191A
Dynasty Puzzles
dp
1500
x4093
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1570
190D
Non-Secret Cypher
two pointers
1900
x2367
190C
STL
dfs and similar
1500
x2909
190B
Surrounded
geometry
1800
x2869
190A
Vasya and the Bus
greedy
,
math
1100
x5918
189B
Counting Rhombi
brute force
,
math
1300
x3973
189A
Cut Ribbon
brute force
,
dp
1300
x69118
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x268
188G
Array Sorting
*special problem
,
implementation
1600
x337
188F
Binary Notation
*special problem
,
implementation
1400
x307
188E
HQ9+
*special problem
,
implementation
1400
x506
188D
Asterisks
*special problem
,
implementation
1100
x687
188C
LCM
*special problem
,
implementation
,
math
1400
x459
188B
A + Reverse B
*special problem
,
implementation
1300
x744
188A
Hexagonal Numbers
*special problem
1100
x786
187E
Heaven Tour
data structures
,
greedy
2900
x104
187D
BRT Contract
data structures
2800
x539
187C
Weak Memory
dfs and similar
,
dsu
2000
x1390
187B
AlgoRace
dp
,
shortest paths
1800
x2008
187A
Permutations
greedy
1500
x2857
186B
Growing Mushrooms
greedy
,
sortings
1200
x5673
186A
Comparing Strings
implementation
,
strings
1100
x17284
185E
Soap Time! - 2
binary search
,
data structures
3000
x146
185D
Visit of the Great
math
,
number theory
2600
x451
185C
Clever Fat Rat
dp
2500
x140
185B
Mushroom Scientists
math
,
ternary search
1800
x1675
185A
Plant
math
1300
x5997
183E
Candy Shop
greedy
2900
x140
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x409
183C
Cyclic Coloring
dfs and similar
2200
x648
183B
Zoo
brute force
,
geometry
1700
x703
183A
Headquarters
constructive algorithms
,
math
1700
x562
182E
Wooden Fence
dp
1800
x1468
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8192
182C
Optimal Sum
data structures
,
greedy
2000
x750
182B
Vasya's Calendar
implementation
1000
x6988
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x292
181B
Number of Triplets
binary search
,
brute force
1300
x3081
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x7408
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2556
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1802
180D
Name
greedy
,
strings
1900
x737
180C
Letter
dp
1400
x7588
180B
Divisibility Rules
math
,
number theory
2300
x355
180A
Defragmentation
implementation
1800
x552
178F3
Representative Sampling
2500
x439
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x356
178F1
Representative Sampling
1800
x410
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
x251
178D2
Magic Squares
1900
x274
178D1
Magic Squares
1500
x654
178C3
Smart Beaver and Resolving Collisions
2000
x328
178C2
Smart Beaver and Resolving Collisions
1900
x310
178C1
Smart Beaver and Resolving Collisions
1600
x497
178B3
Greedy Merchants
1800
x1261
178B2
Greedy Merchants
1600
x685
178B1
Greedy Merchants
1600
x773
178A3
Educational Game
greedy
1100
x1466
178A2
Educational Game
greedy
1000
x1662
178A1
Educational Game
1000
x1645
177G2
Fibonacci Strings
matrices
,
strings
2600
x207
177G1
Fibonacci Strings
strings
2400
x192
177F2
Script Generation
2300
x211
177F1
Script Generation
1800
x306
177E2
Space Voyage
binary search
1900
x439
177E1
Space Voyage
binary search
1700
x630
177D2
Encrypting Messages
data structures
1500
x2075
177D1
Encrypting Messages
brute force
1200
x2233
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2621
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2618
177B2
Rectangular Game
number theory
1200
x3088
177B1
Rectangular Game
number theory
1000
x4303
177A2
Good Matrix Elements
implementation
800
x7466
177A1
Good Matrix Elements
implementation
800
x8911
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1224
176D
Hyper String
dp
2500
x328
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x487
176B
Word Cut
dp
1700
x1892
176A
Trading Business
greedy
,
sortings
1200
x1523
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x66
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x267
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x301
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1338
←
1
2
...
91
92
93
94
95
...
101
102
→
User lists
Name