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Before contest
Codeforces Round #850 (Div. 1, based on VK Cup 2022 - Final Round)
36:56:41
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*has extra registration
Before contest
Codeforces Round #850 (Div. 2, based on VK Cup 2022 - Final Round)
36:56:41
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
dp
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
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Custom test
Problems
#
Name
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x68851
996A
Hit the Lottery
dp
,
greedy
800
x63814
189A
Cut Ribbon
brute force
,
dp
1300
x50165
455A
Boredom
dp
1500
x44649
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x43329
1472B
Fair Division
dp
,
greedy
,
math
800
x38962
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x38433
363B
Fence
brute force
,
dp
1100
x38016
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x37912
1475B
New Year's Number
brute force
,
dp
,
math
900
x37538
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x33697
313B
Ilya and Queries
dp
,
implementation
1100
x33246
368B
Sereja and Suffixes
data structures
,
dp
1100
x32629
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x32421
1538A
Stone Game
brute force
,
dp
,
greedy
800
x31224
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x31108
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x30424
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x29482
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x28097
894A
QAQ
brute force
,
dp
800
x27541
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x27343
1519B
The Cake Is a Lie
dp
,
math
800
x26053
1472C
Long Jumps
dp
,
graphs
1100
x25277
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x24760
1359B
New Theatre Square
brute force
,
dp
,
greedy
,
implementation
,
two pointers
1000
x24667
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x24663
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x24284
1182A
Filling Shapes
dp
,
math
1000
x23812
698A
Vacations
dp
1400
x23237
1206B
Make Product Equal One
dp
,
implementation
900
x23071
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x22852
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x22806
1469B
Red and Blue
dp
,
greedy
1000
x22538
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x22523
1355B
Young Explorers
dp
,
greedy
,
sortings
1200
x22335
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x22303
1382B
Sequential Nim
dp
,
games
1100
x22174
545C
Woodcutters
dp
,
greedy
1500
x22142
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x22098
732B
Cormen --- The Best Friend Of a Man
dp
,
greedy
1000
x21920
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x21622
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x21454
1539B
Love Song
dp
,
implementation
,
strings
800
x21439
1466B
Last minute enhancements
dp
,
greedy
800
x21323
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x21316
1593B
Make it Divisible by 25
dfs and similar
,
dp
,
greedy
,
math
,
math
900
x21125
1272C
Yet Another Broken Keyboard
combinatorics
,
dp
,
implementation
1200
x20953
431C
k-Tree
dp
,
implementation
,
trees
1600
x20672
1097B
Petr and a Combination Lock
bitmasks
,
brute force
,
dp
1200
x20573
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x20326
1559B
Mocha and Red and Blue
dp
,
greedy
900
x20094
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x20007
474D
Flowers
dp
1700
x19929
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x19501
1195C
Basketball Exercise
dp
1400
x19375
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x19205
1398C
Good Subarrays
data structures
,
dp
,
math
1600
x18788
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x18649
1499B
Binary Removals
brute force
,
dp
,
greedy
,
implementation
1000
x18613
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x18233
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x17929
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x17928
1350B
Orac and Models
dp
,
math
,
number theory
1400
x17805
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x17586
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x17566
1631B
Fun with Even Subarrays
dp
,
greedy
1100
x17439
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x17409
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x17273
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x17146
166E
Tetrahedron
dp
,
math
,
matrices
1500
x16932
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x16762
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x16673
1037C
Equalize
dp
,
greedy
,
strings
1300
x16557
1501B
Napoleon Cake
dp
,
implementation
,
sortings
900
x16512
1686B
Odd Subarrays
dp
,
greedy
800
x16474
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x16392
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x16185
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x15916
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x15914
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x15826
1113A
Sasha and His Trip
dp
,
greedy
,
math
900
x15718
1743C
Save the Magazines
constructive algorithms
,
dp
,
greedy
1100
x15704
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x15695
1566C
MAX-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
1000
x15506
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x15296
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x15271
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x15259
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x15240
1553C
Penalty
bitmasks
,
brute force
,
dp
,
greedy
1200
x15221
1618D
Array and Operations
dp
,
greedy
,
math
1300
x15195
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x15178
1029B
Creating the Contest
dp
,
greedy
,
math
1200
x14957
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x14951
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x14785
1706B
Making Towers
dp
,
greedy
,
math
1100
x14779
1245C
Constanze's Machine
dp
1400
x14636
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x14476
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x14293
118D
Caesar's Legions
dp
1700
x14207
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x14109
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