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Before contest
Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
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data structures
combine-tags-by-or
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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
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number theory
probabilities
schedules
shortest paths
sortings
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strings
ternary search
trees
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Name
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14451
1104B
Game with string
data structures
,
implementation
,
math
1200
x14416
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14410
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14337
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14250
1234D
Distinct Characters Queries
data structures
1600
x14100
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13913
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13875
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13854
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13778
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13746
427B
Prison Transfer
data structures
,
implementation
1100
x13679
380C
Sereja and Brackets
data structures
,
schedules
2000
x13514
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13513
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13499
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13465
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13386
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13269
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13250
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13136
1654C
Alice and the Cake
data structures
,
greedy
,
implementation
,
sortings
1400
x13133
1621B
Integers Shop
data structures
,
greedy
,
implementation
1500
x13064
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x12971
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x12930
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12839
1214C
Bad Sequence
data structures
,
greedy
1200
x12808
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12773
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12733
356A
Knight Tournament
data structures
,
dsu
1500
x12709
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12622
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12583
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12471
18C
Stripe
data structures
,
implementation
1200
x12431
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12336
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x12312
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12283
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12182
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12170
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12095
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11972
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x11969
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11843
879B
Table Tennis
data structures
,
implementation
1200
x11841
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x11786
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x11784
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11758
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11686
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11677
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11611
701B
Cells Not Under Attack
data structures
,
math
1200
x11567
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11423
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11420
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x11396
1279C
Stack of Presents
data structures
,
implementation
1400
x11381
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11337
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11323
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11292
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x11289
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11289
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11127
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x10959
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x10904
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10904
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x10886
1100B
Build a Contest
data structures
,
implementation
1300
x10882
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x10758
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10674
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10586
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10584
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10580
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10490
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10439
1651C
Fault-tolerant Network
brute force
,
data structures
,
implementation
1500
x10436
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10435
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10405
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10386
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10336
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10327
1817A
Almost Increasing Subsequence
binary search
,
data structures
,
greedy
1500
x10265
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10259
271D
Good Substrings
data structures
,
strings
1800
x10215
1179A
Valeriy and Deque
data structures
,
implementation
1500
x10114
1175B
Catch Overflow!
data structures
,
expression parsing
,
implementation
1600
x10080
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10057
61E
Enemy is weak
data structures
,
trees
1900
x10016
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x9981
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x9973
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9859
1883D
In Love
data structures
,
greedy
1500
x9850
1679C
Rooks Defenders
data structures
,
implementation
1400
x9849
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x9776
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9773
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9764
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x9501
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9475
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9472
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9402
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9360
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9346
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9326
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