Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 167 (Rated for Div. 2)
38:11:57
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
571B
Minimization
dp
,
greedy
,
sortings
2000
x2543
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2069
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1814
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6776
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x9000
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15866
570A
Elections
implementation
1100
x13775
569B
Inventory
greedy
,
math
1200
x6986
569A
Music
implementation
,
math
1500
x4754
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x580
568D
Sign Posts
brute force
,
geometry
,
math
2800
x301
568C
New Language
2-sat
,
greedy
2600
x781
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2222
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x5012
567F
Mausoleum
dp
2400
x568
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1669
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4684
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9338
567B
Berland National Library
implementation
1300
x8359
567A
Lineland Mail
greedy
,
implementation
900
x31029
566G
Max and Min
geometry
2500
x334
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3553
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x603
566D
Restructuring Company
data structures
,
dsu
1900
x3138
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x705
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x263
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x877
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7857
560A
Currency System in Geraldion
implementation
,
sortings
1000
x16890
559E
Gerald and Path
dp
,
sortings
3000
x861
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x424
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6230
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10442
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10321
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5730
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1118
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3948
558B
Amr and The Large Array
implementation
1300
x7779
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10220
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1068
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2149
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3945
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7099
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8217
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7893
556A
Case of the Zeros and Ones
greedy
900
x38450
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2212
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x858
555C
Case of Chocolate
data structures
2200
x1951
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3694
555A
Case of Matryoshkas
implementation
1500
x6509
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9760
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12872
553E
Kyoya and Train
dp
,
fft
,
graphs
,
math
,
probabilities
3200
x539
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x985
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1742
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2100
553A
Kyoya and Colored Balls
combinatorics
,
dp
,
math
1500
x8427
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1465
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4382
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5422
552B
Vanya and Books
implementation
,
math
1200
x15274
552A
Vanya and Table
implementation
,
math
1000
x9446
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1673
551D
GukiZ and Binary Operations
combinatorics
,
implementation
,
math
,
matrices
,
number theory
2100
x1817
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3478
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3770
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16077
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1380
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3260
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27670
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19952
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36797
549H
Degenerate Matrix
binary search
,
math
2100
x1842
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2401
549F
Yura and Developers
data structures
,
divide and conquer
2800
x853
549E
Sasha Circle
geometry
,
math
2700
x146
549D
Haar Features
greedy
,
implementation
1900
x2130
549C
The Game Of Parity
games
2200
x1721
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1480
549A
Face Detection
implementation
,
strings
900
x9376
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8316
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9871
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1967
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2458
547C
Mike and Foam
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2300
x2735
547B
Mike and Feet
binary search
,
data structures
,
dp
,
dsu
1900
x8326
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2324
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3501
546D
Soldier and Number Game
constructive algorithms
,
dp
,
math
,
number theory
1700
x11435
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17189
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17342
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x171477
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4475
545D
Queue
greedy
,
implementation
,
sortings
1300
x24339
545C
Woodcutters
dp
,
greedy
1500
x26839
545B
Equidistant String
greedy
1100
x11477
545A
Toy Cars
implementation
900
x11470
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7863
544A
Set of Strings
implementation
,
strings
1100
x7872
←
1
2
...
71
72
73
74
75
...
96
97
→
User lists
Name