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Before contest
Codeforces Round #792 (Div. 1)
2 days
Before contest
Codeforces Round #792 (Div. 2)
2 days
→ Filter Problems
Difficulty:
—
math
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
1680D
Dog Walking
brute force
,
greedy
,
math
2400
x487
1680A
Minimums and Maximums
brute force
,
math
800
x14735
1679F
Formalism for Formalism
bitmasks
,
dp
,
math
2600
x151
1679E
Typical Party in Dorm
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
strings
2400
x445
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x10845
1677F
Tokitsukaze and Gems
dp
,
math
3500
x46
1677D
Tokitsukaze and Permutations
dp
,
math
2500
x655
1677B
Tokitsukaze and Meeting
data structures
,
implementation
,
math
1700
x2218
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x17794
1676B
Equal Candies
greedy
,
math
,
sortings
800
x23056
1675A
Food for Animals
greedy
,
math
800
x19804
1674E
Breaking the Wall
binary search
,
brute force
,
constructive algorithms
,
greedy
,
math
2000
x3960
1674B
Dictionary
combinatorics
,
math
800
x17891
1674A
Number Transformation
constructive algorithms
,
math
800
x18282
1673F
Anti-Theft Road Planning
bitmasks
,
constructive algorithms
,
divide and conquer
,
greedy
,
interactive
,
math
2400
x488
1673E
Power or XOR?
bitmasks
,
combinatorics
,
math
,
number theory
2500
x397
1673D
Lost Arithmetic Progression
combinatorics
,
math
,
number theory
1900
x2119
1673C
Palindrome Basis
brute force
,
dp
,
math
,
number theory
1500
x6518
1672G
Cross Xor
constructive algorithms
,
graphs
,
math
,
matrices
3200
x144
1672A
Log Chopping
games
,
implementation
,
math
800
x12532
1671F
Permutation Counting
brute force
,
combinatorics
,
dp
,
fft
,
math
2700
x169
1671C
Dolce Vita
binary search
,
brute force
,
greedy
,
math
1200
x9772
1671B
Consecutive Points Segment
brute force
,
math
,
sortings
1000
x12902
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x3077
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x5392
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x8889
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x10020
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x21368
1668B
Social Distance
greedy
,
math
,
sortings
900
x11800
1668A
Direction Change
implementation
,
math
800
x13459
1667E
Centroid Probabilities
combinatorics
,
dp
,
fft
,
math
3000
x259
1667C
Half Queen Cover
constructive algorithms
,
math
2400
x905
1667A
Make it Increasing
brute force
,
greedy
,
math
1300
x9626
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x869
1666H
Heroes of Might
math
3500
x23
1666G
Global Warming
geometry
,
math
3100
x84
1666E
Even Split
binary search
,
constructive algorithms
,
greedy
,
math
2500
x387
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x2379
1665A
GCD vs LCM
constructive algorithms
,
math
800
x18336
1663D
Is it rated - 3
combinatorics
,
dp
,
math
x1023
1663C
Pōja Verdon
implementation
,
math
x4781
1663B
Mike's Sequence
divide and conquer
,
implementation
,
math
x2557
1662N
Drone Photo
combinatorics
,
math
,
sortings
x235
1662L
Il Derby della Madonnina
data structures
,
dp
,
math
x424
1662H
Boundary
brute force
,
math
x1320
1662E
Round Table
math
x41
1662C
European Trip
dp
,
graphs
,
math
,
matrices
x139
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x614
1661C
Water the Trees
binary search
,
greedy
,
math
1700
x6040
1661A
Array Balancing
greedy
,
math
800
x15498
1660F2
Promising String (hard version)
data structures
,
implementation
,
math
,
strings
2100
x1768
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x4996
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x5359
1660B
Vlad and Candies
math
800
x21873
1660A
Vasya and Coins
greedy
,
math
800
x26666
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x2537
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x5919
1659A
Red Versus Blue
constructive algorithms
,
greedy
,
implementation
,
math
1000
x11457
1658F
Juju and Binary String
brute force
,
constructive algorithms
,
greedy
,
math
2700
x481
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x675
1658D2
388535 (Hard Version)
bitmasks
,
brute force
,
data structures
,
math
2300
x1719
1658D1
388535 (Easy Version)
bitmasks
,
math
1600
x6277
1658C
Shinju and the Lost Permutation
constructive algorithms
,
math
1700
x7146
1658B
Marin and Anti-coprime Permutation
combinatorics
,
math
,
number theory
800
x15509
1658A
Marin and Photoshoot
constructive algorithms
,
implementation
,
math
800
x17605
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1171
1657D
For Gamers. By Gamers.
binary search
,
brute force
,
greedy
,
math
,
sortings
2000
x3726
1657A
Integer Moves
brute force
,
math
800
x20339
1656H
Equal LCM Subsets
data structures
,
math
,
number theory
3200
x169
1656G
Cycle Palindrome
constructive algorithms
,
graphs
,
math
3200
x150
1656F
Parametric MST
binary search
,
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
2600
x666
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x2294
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x4812
1656C
Make Equal With Mod
constructive algorithms
,
math
,
number theory
,
sortings
1200
x12576
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x13208
1656A
Good Pairs
math
,
sortings
800
x16471
1654H
Three Minimums
combinatorics
,
constructive algorithms
,
divide and conquer
,
dp
,
fft
,
math
3500
x36
1654E
Arithmetic Operations
brute force
,
data structures
,
graphs
,
math
2300
x1390
1654D
Potion Brewing Class
dfs and similar
,
math
,
number theory
,
trees
2100
x2146
1651E
Sum of Matchings
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
greedy
,
math
2600
x350
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x3037
1650D
Twist the Permutation
brute force
,
constructive algorithms
,
implementation
,
math
1300
x9472
1650B
DIV + MOD
math
900
x19716
1648B
Integral Array
brute force
,
constructive algorithms
,
data structures
,
math
1800
x4413
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x8210
1647D
Madoka and the Best School in Russia
constructive algorithms
,
dp
,
math
,
number theory
1900
x3869
1647A
Madoka and Math Dad
implementation
,
math
800
x19225
1646E
Power Board
brute force
,
dp
,
math
,
number theory
2200
x1567
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x8844
1646A
Square Counting
math
800
x20021
1644F
Basis
combinatorics
,
fft
,
math
,
number theory
2900
x221
1644E
Expand the Path
brute force
,
combinatorics
,
data structures
,
implementation
,
math
1900
x2221
1644D
Cross Coloring
data structures
,
implementation
,
math
1700
x5239
1641E
Special Positions
combinatorics
,
divide and conquer
,
fft
,
math
3300
x141
1641D
Two Arrays
bitmasks
,
brute force
,
combinatorics
,
greedy
,
hashing
,
math
,
two pointers
2700
x701
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x11323
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x16058
1638A
Reverse
constructive algorithms
,
greedy
,
math
800
x19013
1637H
Minimize Inversions Number
data structures
,
greedy
,
math
,
sortings
3500
x143
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x303
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