Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 968 (Div. 2)
46:19:52
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
constructive algorithms
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
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x22308
1773F
Football
constructive algorithms
800
x4056
1772C
Different Differences
constructive algorithms
,
greedy
,
math
1000
x23459
1770B
Koxia and Permutation
constructive algorithms
1000
x19297
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15595
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16811
1761B
Elimination of a Ring
constructive algorithms
,
greedy
,
implementation
1000
x13332
1761A
Two Permutations
brute force
,
constructive algorithms
800
x19035
1758B
XOR = Average
constructive algorithms
900
x21054
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x25045
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18820
1750A
Indirect Sort
constructive algorithms
,
implementation
,
math
800
x17001
1747B
BAN BAN
constructive algorithms
900
x22716
1747A
Two Groups
constructive algorithms
,
greedy
800
x24737
1746B
Rebellion
constructive algorithms
,
greedy
,
two pointers
800
x17060
1746A
Maxmina
constructive algorithms
,
greedy
800
x19749
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x19048
1743B
Permutation Value
constructive algorithms
,
greedy
800
x22140
1741B
Funny Permutation
constructive algorithms
,
math
800
x25253
1740A
Factorise N+M
constructive algorithms
,
number theory
800
x20008
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x22157
1735A
Working Week
constructive algorithms
,
greedy
,
math
800
x20119
1734B
Bright, Nice, Brilliant
constructive algorithms
800
x15722
1733B
Rule of League
constructive algorithms
,
math
900
x19584
1732A
Bestie
brute force
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x14826
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x19833
1728B
Best Permutation
constructive algorithms
,
greedy
800
x20073
1726B
Mainak and Interesting Sequence
bitmasks
,
constructive algorithms
,
math
1100
x15013
1719B
Mathematical Circus
constructive algorithms
,
math
800
x18457
1717B
Madoka and Underground Competitions
constructive algorithms
,
implementation
1100
x14657
1716B
Permutation Chain
constructive algorithms
,
math
800
x21349
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x21356
1715A
Crossmarket
constructive algorithms
,
greedy
,
math
800
x23417
1713B
Optimal Reduction
constructive algorithms
,
sortings
1000
x21115
1712B
Woeful Permutation
constructive algorithms
,
greedy
,
number theory
800
x21469
1711A
Perfect Permutation
constructive algorithms
800
x25045
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x20395
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22804
1705B
Mark the Dust Sweeper
constructive algorithms
,
greedy
,
implementation
900
x22764
1704A
Two 0-1 Sequences
constructive algorithms
,
greedy
800
x15945
1702A
Round Down the Price
constructive algorithms
800
x34365
1700B
Palindromic Numbers
constructive algorithms
,
implementation
,
math
1100
x18624
1700A
Optimal Path
constructive algorithms
,
greedy
,
math
800
x22792
1699B
Almost Ternary Matrix
bitmasks
,
constructive algorithms
,
matrices
900
x19571
1699A
The Third Three Number Problem
constructive algorithms
,
math
800
x23910
1698B
Rising Sand
constructive algorithms
,
greedy
,
implementation
800
x20864
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x22521
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x33168
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x18136
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x16934
1684B
Z mod X = C
constructive algorithms
,
math
800
x20888
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23745
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x18229
1674A
Number Transformation
constructive algorithms
,
math
800
x26125
1672C
Unequal Array
constructive algorithms
,
greedy
,
implementation
1100
x13158
1672B
I love AAAB
constructive algorithms
,
implementation
800
x15754
1665B
Array Cloning Technique
constructive algorithms
,
greedy
,
sortings
900
x19903
1665A
GCD vs LCM
constructive algorithms
,
math
800
x23416
1659A
Red Versus Blue
constructive algorithms
,
greedy
,
implementation
,
math
1000
x18165
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20267
1651B
Prove Him Wrong
constructive algorithms
,
greedy
800
x19490
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x21075
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20616
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21393
1634C
OKEA
constructive algorithms
1000
x18111
1632B
Roof Construction
bitmasks
,
constructive algorithms
1000
x21919
1627A
Not Shading
constructive algorithms
,
implementation
800
x23947
1626A
Equidistant Letters
constructive algorithms
,
sortings
800
x28660
1624C
Division by Two and Permutation
constructive algorithms
,
flows
,
graph matchings
,
greedy
,
math
1100
x24673
1621A
Stable Arrangement of Rooks
constructive algorithms
800
x23708
1620A
Equal or Not Equal
constructive algorithms
,
dsu
,
implementation
800
x21490
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x23078
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16231
1614B
Divan and a New Project
constructive algorithms
,
sortings
1000
x18814
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x23206
1612B
Special Permutation
constructive algorithms
,
greedy
900
x17095
1612A
Distance
brute force
,
constructive algorithms
800
x17613
1611C
Polycarp Recovers the Permutation
constructive algorithms
1000
x18248
1611B
Team Composition: Programmers and Mathematicians
binary search
,
constructive algorithms
,
math
800
x29272
1611A
Make Even
constructive algorithms
,
math
800
x31244
1608A
Find Array
constructive algorithms
,
math
800
x18988
1602B
Divine Array
constructive algorithms
,
implementation
1100
x14021
1579E1
Permutation Minimization by Deque
constructive algorithms
,
greedy
,
math
1000
x21414
1574A
Regular Bracket Sequences
constructive algorithms
800
x21691
1569B
Chess Tournament
constructive algorithms
1000
x18761
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x17418
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x19468
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19482
1559A
Mocha and Math
bitmasks
,
constructive algorithms
,
math
900
x30633
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x29274
1537B
Bad Boy
constructive algorithms
,
greedy
,
math
900
x29354
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20156
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15756
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29651
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x24082
1525B
Permutation Sort
constructive algorithms
,
greedy
900
x24590
1523B
Lord of the Values
constructive algorithms
1100
x12059
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x36609
1520C
Not Adjacent Matrix
constructive algorithms
1000
x31429
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20184
←
1
2
3
4
→
User lists
Name