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Before contest
Codeforces Round 941 (Div. 1)
03:19:19
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
03:19:19
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→ Filter Problems
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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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Status
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Custom test
Problems
#
Name
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82224
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58092
363B
Fence
brute force
,
dp
1100
x48994
456A
Laptops
sortings
1100
x45224
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43334
313B
Ilya and Queries
dp
,
implementation
1100
x41431
368B
Sereja and Suffixes
data structures
,
dp
1100
x39403
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37612
1327A
Sum of Odd Integers
math
1100
x36774
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x35687
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33186
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x31634
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31189
1472C
Long Jumps
dp
,
graphs
1100
x29718
82A
Double Cola
implementation
,
math
1100
x29389
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x28887
349A
Cinema Line
greedy
,
implementation
1100
x28640
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x28201
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x27420
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26845
919B
Perfect Number
binary search
,
brute force
,
dp
,
implementation
,
number theory
1100
x26788
227B
Effective Approach
implementation
1100
x26303
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x25731
1213B
Bad Prices
data structures
,
implementation
1100
x25587
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25451
1791E
Negatives and Positives
dp
,
greedy
,
sortings
1100
x25418
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x25281
1334B
Middle Class
greedy
,
sortings
1100
x25135
478A
Initial Bet
implementation
1100
x24981
1676E
Eating Queries
binary search
,
greedy
,
sortings
1100
x24523
1463A
Dungeon
binary search
,
math
1100
x24412
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24227
1624C
Division by Two and Permutation
constructive algorithms
,
flows
,
graph matchings
,
greedy
,
math
1100
x23976
1382B
Sequential Nim
dp
,
games
1100
x23851
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x23533
1342B
Binary Period
constructive algorithms
,
strings
1100
x23131
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x23061
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22907
1557B
Moamen and k-subarrays
greedy
,
sortings
1100
x22778
1873E
Building an Aquarium
binary search
,
sortings
1100
x22665
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x22473
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22341
1626B
Minor Reduction
greedy
,
strings
1100
x22291
1722D
Line
greedy
,
sortings
1100
x22158
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22135
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22061
258A
Little Elephant and Bits
greedy
,
math
1100
x22001
1857B
Maximum Rounding
greedy
,
implementation
,
math
1100
x21987
1547C
Pair Programming
greedy
,
two pointers
1100
x21986
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x21924
296A
Yaroslav and Permutations
greedy
,
math
1100
x21906
1872C
Non-coprime Split
math
,
number theory
1100
x21847
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x21843
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21560
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21466
1702C
Train and Queries
data structures
,
greedy
1100
x21440
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x21416
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21358
1618C
Paint the Array
math
1100
x21356
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x21244
1333B
Kind Anton
greedy
,
implementation
1100
x21213
1509B
TMT Document
greedy
1100
x21079
1669D
Colorful Stamp
implementation
1100
x20992
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x20727
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20671
1914C
Quests
greedy
,
math
1100
x20539
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x20412
1791G1
Teleporters (Easy Version)
greedy
,
sortings
1100
x20380
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20372
630C
Lucky Numbers
combinatorics
,
math
1100
x20350
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20320
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20217
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20085
1407A
Ahahahahahahahaha
constructive algorithms
,
math
1100
x20065
1506B
Partial Replacement
greedy
,
implementation
1100
x19877
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19842
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19612
1633C
Kill the Monster
brute force
,
math
1100
x19589
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19562
1593D1
All are Same
math
,
number theory
1100
x19538
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19507
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x19496
1708B
Difference of GCDs
constructive algorithms
,
math
1100
x19429
66B
Petya and Countryside
brute force
,
implementation
1100
x19394
1729C
Jumping on Tiles
constructive algorithms
,
strings
1100
x19365
1631B
Fun with Even Subarrays
dp
,
greedy
1100
x19253
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19229
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19206
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19190
767A
Snacktower
data structures
,
implementation
1100
x19187
1712C
Sort Zero
greedy
,
sortings
1100
x19186
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19126
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19115
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19097
1332A
Exercising Walk
greedy
,
implementation
,
math
1100
x19084
1616B
Mirror in the String
greedy
,
strings
1100
x19065
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19012
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x19007
1811C
Restore the Array
constructive algorithms
,
greedy
1100
x18818
1594B
Special Numbers
bitmasks
,
math
1100
x18777
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