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Before contest
Codeforces Round 941 (Div. 1)
3 days
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Before contest
Codeforces Round 941 (Div. 2)
3 days
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math
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
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shortest paths
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ternary search
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two pointers
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Custom test
Problems
#
Name
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22115
1731A
Joey Takes Money
greedy
,
math
800
x22105
294A
Shaass and Oskols
implementation
,
math
800
x22045
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22036
258A
Little Elephant and Bits
greedy
,
math
1100
x21991
1857B
Maximum Rounding
greedy
,
implementation
,
math
1100
x21974
1542B
Plus and Multiply
constructive algorithms
,
math
,
number theory
1500
x21971
1771A
Hossam and Combinatorics
combinatorics
,
math
,
sortings
900
x21968
1768B
Quick Sort
greedy
,
math
900
x21951
610A
Pasha and Stick
combinatorics
,
math
1000
x21945
1774A
Add Plus Minus Sign
constructive algorithms
,
math
800
x21913
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x21913
296A
Yaroslav and Permutations
greedy
,
math
1100
x21886
1388B
Captain Flint and a Long Voyage
greedy
,
math
1000
x21875
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x21875
1858C
Yet Another Permutation Problem
constructive algorithms
,
greedy
,
math
,
number theory
1000
x21834
1872C
Non-coprime Split
math
,
number theory
1100
x21826
1249A
Yet Another Dividing into Teams
math
800
x21805
1452A
Robot Program
math
800
x21769
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21700
1905A
Constructive Problems
constructive algorithms
,
math
800
x21678
1720A
Burenka Plays with Fractions
math
,
number theory
900
x21677
1B
Spreadsheet
implementation
,
math
1600
x21639
1742E
Scuza
binary search
,
greedy
,
math
1200
x21625
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21611
1759B
Lost Permutation
math
800
x21554
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21549
1708A
Difference Operations
greedy
,
math
800
x21455
1840B
Binary Cafe
bitmasks
,
combinatorics
,
math
1100
x21400
1739B
Array Recovery
constructive algorithms
,
greedy
,
math
1100
x21344
1618C
Paint the Array
math
1100
x21334
1223A
CME
math
800
x21296
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21281
1418A
Buying Torches
math
1000
x21264
1061A
Coins
greedy
,
implementation
,
math
800
x21252
1455B
Jumps
constructive algorithms
,
math
1200
x21203
1283B
Candies Division
math
900
x21200
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x21185
1716B
Permutation Chain
constructive algorithms
,
math
800
x21177
1937A
Shuffle Party
implementation
,
math
800
x21166
1692F
3SUM
brute force
,
math
1300
x21156
1201C
Maximum Median
binary search
,
greedy
,
math
,
sortings
1400
x21154
1777A
Everybody Likes Good Arrays!
greedy
,
math
800
x21033
1838A
Blackboard List
constructive algorithms
,
math
800
x21011
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21002
1680A
Minimums and Maximums
brute force
,
math
800
x20987
1834A
Unit Array
greedy
,
math
800
x20963
1928A
Rectangle Cutting
geometry
,
math
800
x20939
1406A
Subset Mex
greedy
,
implementation
,
math
900
x20899
1269A
Equation
brute force
,
math
800
x20821
1845B
Come Together
geometry
,
implementation
,
math
900
x20805
1579E1
Permutation Minimization by Deque
constructive algorithms
,
greedy
,
math
1000
x20788
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x20758
1530A
Binary Decimal
greedy
,
math
800
x20734
1872D
Plus Minus Permutation
math
1200
x20722
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20720
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x20720
1401B
Ternary Sequence
constructive algorithms
,
greedy
,
math
1100
x20713
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20697
1300A
Non-zero
implementation
,
math
800
x20656
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20621
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x20619
1422A
Fence
geometry
,
math
800
x20608
1684B
Z mod X = C
constructive algorithms
,
math
800
x20580
913A
Modular Exponentiation
implementation
,
math
900
x20528
746A
Compote
implementation
,
math
800
x20519
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x20499
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20496
1914C
Quests
greedy
,
math
1100
x20479
1828B
Permutation Swap
math
,
number theory
900
x20479
1615A
Closing The Gap
greedy
,
math
800
x20473
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20440
682A
Alyona and Numbers
constructive algorithms
,
math
,
number theory
1100
x20391
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20359
630C
Lucky Numbers
combinatorics
,
math
1100
x20339
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20315
832A
Sasha and Sticks
games
,
math
800
x20313
1605A
A.M. Deviation
math
,
number theory
800
x20309
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20199
1436B
Prime Square
constructive algorithms
,
math
900
x20193
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20154
1744D
Divisibility by 2^n
greedy
,
math
,
sortings
1200
x20151
1371C
A Cookie for You
greedy
,
implementation
,
math
1300
x20147
1392A
Omkar and Password
greedy
,
math
800
x20135
1482A
Prison Break
math
800
x20126
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x20119
1792B
Stand-up Comedian
greedy
,
math
1200
x20113
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20108
1221C
Perfect Team
binary search
,
math
1200
x20085
1249B1
Books Exchange (easy version)
dsu
,
math
1000
x20071
1407A
Ahahahahahahahaha
constructive algorithms
,
math
1100
x20062
1257A
Two Rival Students
greedy
,
math
800
x20007
1715B
Beautiful Array
constructive algorithms
,
greedy
,
math
1000
x20003
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20003
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x19993
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x19985
513A
Game
constructive algorithms
,
math
800
x19910
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x19892
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x19873
166E
Tetrahedron
dp
,
math
,
matrices
1500
x19863
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