Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 950 (Div. 3)
09:04:41
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
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x276
1693E
Outermost Maximums
data structures
,
greedy
3400
x374
1693D
Decinc Dividing
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
2800
x783
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2458
1693B
Fake Plastic Trees
dfs and similar
,
dp
,
greedy
,
trees
1700
x8120
1693A
Directional Increase
greedy
1300
x15739
1692H
Gambling
data structures
,
dp
,
greedy
,
math
1700
x7137
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16226
1692F
3SUM
brute force
,
math
1300
x21568
1692E
Binary Deque
binary search
,
implementation
,
two pointers
1200
x20260
1692D
The Clock
brute force
,
implementation
1100
x18832
1692C
Where's the Bishop?
implementation
800
x32699
1692B
All Distinct
greedy
,
sortings
800
x32995
1692A
Marathon
implementation
800
x60756
1691F
K-Set Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2500
x914
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1762
1691D
Max GEQ Sum
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
implementation
,
two pointers
1800
x5538
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15183
1691B
Shoe Shuffling
constructive algorithms
,
greedy
,
implementation
,
two pointers
1000
x21542
1691A
Beat The Odds
brute force
,
greedy
,
math
800
x29974
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3275
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6871
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14638
1690D
Black and White Stripe
implementation
,
two pointers
1000
x27223
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25558
1690B
Array Decrements
greedy
,
implementation
800
x24865
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x32694
1689E
ANDfinity
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1157
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4051
1689C
Infected Tree
dfs and similar
,
dp
,
trees
1600
x10705
1689B
Mystic Permutation
data structures
,
greedy
900
x17163
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16411
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x7947
1688B
Patchouli's Magical Talisman
bitmasks
,
constructive algorithms
,
greedy
,
sortings
800
x17935
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x20961
1687F
Koishi's Unconscious Permutation
fft
,
math
3500
x78
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x219
1687D
Cute number
binary search
,
brute force
,
data structures
,
dsu
,
implementation
,
math
2900
x559
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1345
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3501
1687A
The Enchanted Forest
brute force
,
greedy
1600
x10050
1686B
Odd Subarrays
dp
,
greedy
800
x17962
1686A
Everything Everywhere All But One
greedy
800
x20227
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x143
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x105
1685D1
Permutation Weight (Easy Version)
constructive algorithms
,
dfs and similar
,
dsu
2800
x427
1685C
Bring Balance
brute force
,
constructive algorithms
,
greedy
2600
x934
1685B
Linguistics
greedy
,
implementation
,
sortings
,
strings
2000
x3181
1685A
Circular Local MiniMax
constructive algorithms
,
greedy
,
sortings
1100
x16568
1684H
Hard Cut
constructive algorithms
,
dfs and similar
,
divide and conquer
,
math
3400
x236
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x582
1684F
Diverse Segments
data structures
,
two pointers
2600
x845
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3066
1684D
Traps
constructive algorithms
,
greedy
,
sortings
1700
x9367
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x12073
1684B
Z mod X = C
constructive algorithms
,
math
800
x20671
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23541
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x289
1682E
Unordered Swaps
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
,
trees
2700
x566
1682D
Circular Spanning Tree
constructive algorithms
,
implementation
,
trees
2000
x3199
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14224
1682B
AND Sorting
bitmasks
,
constructive algorithms
,
sortings
1100
x17437
1682A
Palindromic Indices
greedy
,
strings
800
x19080
1681F
Unique Occurrences
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
dsu
,
trees
2300
x1567
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x704
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9318
1681C
Double Sort
implementation
,
sortings
1200
x17047
1681B
Card Trick
implementation
,
math
800
x19873
1681A
Game with Cards
games
,
greedy
800
x20789
1680F
Lenient Vertex Cover
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
trees
2600
x633
1680E
Moving Chips
bitmasks
,
dp
,
greedy
2000
x3650
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x1125
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9577
1680B
Robots
implementation
800
x18091
1680A
Minimums and Maximums
brute force
,
math
800
x21053
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x503
1679E
Typical Party in Dorm
bitmasks
,
combinatorics
,
dp
,
strings
2400
x1106
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x4595
1679C
Rooks Defenders
data structures
,
implementation
1400
x9960
1679B
Stone Age Problem
data structures
,
implementation
1200
x17196
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x22241
1678B2
Tokitsukaze and Good 01-String (hard version)
dp
,
greedy
,
implementation
1800
x6415
1678B1
Tokitsukaze and Good 01-String (easy version)
implementation
800
x15708
1678A
Tokitsukaze and All Zero Sequence
implementation
800
x17945
1677F
Tokitsukaze and Gems
dp
,
math
3500
x88
1677E
Tokitsukaze and Beautiful Subsegments
data structures
2900
x507
1677D
Tokitsukaze and Permutations
dp
,
math
2500
x1196
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3430
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x4031
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8154
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x10163
1676H1
Maximum Crossings (Easy Version)
brute force
1400
x13411
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14395
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15966
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x24867
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x24204
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28994
1676B
Equal Candies
greedy
,
math
,
sortings
800
x45648
1676A
Lucky?
implementation
800
x59037
1675G
Sorting Pancakes
dp
2300
x1612
←
1
2
...
16
17
18
19
20
...
95
96
→
User lists
Name