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Before contest
Codeforces Round 941 (Div. 1)
2 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
*has extra registration
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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
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strings
ternary search
trees
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Custom test
Problems
#
Name
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2409
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2504
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3102
632B
Alice, Bob, Two Teams
brute force
,
constructive algorithms
1400
x3884
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4064
865A
Save the problem!
constructive algorithms
1400
x4135
748C
Santa Claus and Robot
constructive algorithms
,
math
1400
x4539
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4605
803A
Maximal Binary Matrix
constructive algorithms
1400
x4735
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5184
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5515
808C
Tea Party
constructive algorithms
,
greedy
,
sortings
1400
x5952
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6284
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x6878
911C
Three Garlands
brute force
,
constructive algorithms
1400
x6951
675B
Restoring Painting
brute force
,
constructive algorithms
,
math
1400
x7280
1004C
Sonya and Robots
constructive algorithms
,
implementation
1400
x7426
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7538
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7704
544B
Sea and Islands
constructive algorithms
,
implementation
1400
x7801
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x7930
357B
Flag Day
constructive algorithms
,
implementation
1400
x8021
711B
Chris and Magic Square
constructive algorithms
,
implementation
1400
x8348
1896C
Matching Arrays
binary search
,
constructive algorithms
,
greedy
,
sortings
1400
x8537
1863D
Two-Colored Dominoes
constructive algorithms
,
greedy
1400
x8892
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9136
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9171
1750C
Complementary XOR
constructive algorithms
,
implementation
1400
x9222
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9345
1103A
Grid game
constructive algorithms
,
implementation
1400
x9574
1408B
Arrays Sum
constructive algorithms
,
greedy
,
math
1400
x9748
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x9858
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x9906
1903C
Theofanis' Nightmare
constructive algorithms
,
greedy
1400
x10261
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10523
1901C
Add, Divide and Floor
constructive algorithms
,
greedy
,
math
1400
x10594
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x10946
1696C
Fishingprince Plays With Array
constructive algorithms
,
greedy
,
implementation
,
math
1400
x11290
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11572
1907D
Jumping Through Segments
binary search
,
constructive algorithms
1400
x11803
1684C
Column Swapping
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x11996
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12087
1927E
Klever Permutation
constructive algorithms
,
math
,
two pointers
1400
x12212
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x12276
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12467
1833D
Flipper
brute force
,
constructive algorithms
,
greedy
1400
x12632
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12748
1733D1
Zero-One (Easy Version)
constructive algorithms
,
greedy
,
math
1400
x12864
1923C
Find B
constructive algorithms
,
greedy
1400
x12884
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13040
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13057
1453B
Suffix Operations
constructive algorithms
,
implementation
1400
x13111
1559D1
Mocha and Diana (Easy Version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
1400
x13167
1837D
Bracket Coloring
constructive algorithms
,
greedy
1400
x13233
1854A1
Dual (Easy Version)
constructive algorithms
,
math
1400
x13280
1838C
No Prime Differences
constructive algorithms
,
math
,
number theory
1400
x13361
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x13565
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13658
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x13684
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13913
1627C
Not Assigning
constructive algorithms
,
dfs and similar
,
number theory
,
trees
1400
x14002
1682C
LIS or Reverse LIS?
constructive algorithms
,
greedy
,
implementation
,
math
1400
x14082
1790E
Vlad and a Pair of Numbers
bitmasks
,
constructive algorithms
1400
x14113
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14680
1772D
Absolute Sorting
constructive algorithms
,
math
1400
x14835
1551B2
Wonderful Coloring - 2
binary search
,
constructive algorithms
,
data structures
,
greedy
1400
x15015
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15052
1628A
Meximum Array
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
1400
x15170
1579D
Productive Meeting
constructive algorithms
,
graphs
,
greedy
1400
x15338
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x16230
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16433
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17009
1355D
Game With Array
constructive algorithms
,
math
1400
x17399
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17567
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x18693
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19243
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20399
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x20650
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x22183
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x24498
85A
Domino
constructive algorithms
,
implementation
1300
x1754
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2004
730H
Delete Them
constructive algorithms
,
implementation
1300
x2915
634A
Island Puzzle
constructive algorithms
,
implementation
1300
x3085
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3838
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x3992
1425H
Huge Boxes of Animal Toys
constructive algorithms
1300
x4074
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5079
814B
An express train to reveries
constructive algorithms
1300
x5543
659B
Qualifying Contest
constructive algorithms
,
sortings
1300
x6176
909B
Segments
constructive algorithms
,
math
1300
x6191
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6500
633B
A Trivial Problem
brute force
,
constructive algorithms
,
math
,
number theory
1300
x6531
625C
K-special Tables
constructive algorithms
,
implementation
1300
x6638
610B
Vika and Squares
constructive algorithms
,
implementation
1300
x7039
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7585
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7672
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8258
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8751
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x8799
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