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Before contest
Codeforces Round 974 (Div. 3)
06:51:31
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→ Filter Problems
Difficulty:
—
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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Problems
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Status
Standings
Custom test
Problems
#
Name
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x11600
1478C
Nezzar and Symmetric Array
implementation
,
math
,
sortings
1700
x9745
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x18261
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26424
1477F
Nezzar and Chocolate Bars
combinatorics
,
fft
,
math
,
probabilities
3500
x132
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x121
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x548
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2303
1477B
Nezzar and Binary String
data structures
,
greedy
1900
x3191
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x5897
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x574
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x727
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2338
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8614
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11343
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x19972
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x37162
1475G
Strange Beauty
dp
,
math
,
number theory
,
sortings
1900
x6777
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5294
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x13566
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x10112
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x21064
1475B
New Year's Number
brute force
,
dp
,
math
900
x48625
1475A
Odd Divisor
math
,
number theory
900
x60147
1474F
1 2 3 4 ...
dp
,
math
,
matrices
3000
x244
1474E
What Is It?
constructive algorithms
,
greedy
2500
x1325
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x3973
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12632
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x28438
1474A
Puzzle From the Future
greedy
800
x22423
1473G
Tiles
combinatorics
,
dp
,
fft
,
math
2800
x392
1473F
Strange Set
flows
,
math
2700
x952
1473E
Minimum Path
graphs
,
shortest paths
2400
x3605
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9604
1473C
No More Inversions
constructive algorithms
,
math
1500
x12659
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x31263
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33591
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4650
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x3052
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x8001
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x27246
1472C
Long Jumps
dp
,
graphs
1100
x31153
1472B
Fair Division
dp
,
greedy
,
math
800
x49917
1472A
Cards for Friends
greedy
,
math
800
x41827
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19312
1471A
Strange Partition
greedy
,
math
,
number theory
900
x26040
1470F
Strange Covering
divide and conquer
3500
x120
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x298
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3708
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1328
1470B
Strange Definition
bitmasks
,
graphs
,
hashing
,
math
,
number theory
1900
x6305
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x22352
1469F
Power Sockets
binary search
,
data structures
,
greedy
2600
x897
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1958
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9411
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10729
1469B
Red and Blue
dp
,
greedy
1000
x27220
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x27301
1468N
Waste Sorting
greedy
,
implementation
900
x8134
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x940
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x321
1468K
The Robot
brute force
,
implementation
1600
x5084
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x4254
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x496
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1786
1468G
Hobbits
binary search
,
geometry
2500
x815
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3705
1468E
Four Segments
greedy
800
x8778
1468D
Firecrackers
binary search
,
sortings
1700
x4641
1468C
Berpizza
data structures
,
implementation
1400
x7783
1468B
Bakery
data structures
,
dsu
2900
x212
1468A
LaIS
data structures
,
dp
,
greedy
2200
x1656
1467E
Distinctive Roots in a Tree
data structures
,
dfs and similar
,
dp
,
trees
2500
x1433
1467D
Sum of Paths
combinatorics
,
dp
,
math
2200
x3668
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6380
1467B
Hills And Valleys
brute force
,
implementation
1700
x10919
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x24292
1466I
The Riddle of the Sphinx
binary search
,
data structures
,
data structures
,
interactive
3400
x190
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x272
1466G
Song of the Sirens
combinatorics
,
divide and conquer
,
hashing
,
math
,
string suffix structures
,
strings
2600
x920
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2866
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x7286
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x11288
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17613
1466B
Last minute enhancements
dp
,
greedy
800
x22626
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22506
1464F
My Beautiful Madness
data structures
,
trees
3500
x305
1463F
Max Correct Set
bitmasks
,
dp
,
math
3100
x582
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1505
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4414
1463C
Busy Robot
implementation
1800
x5645
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x19331
1463A
Dungeon
binary search
,
math
1100
x25487
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6947
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9663
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13704
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16691
1462C
Unique Number
brute force
,
greedy
,
math
900
x32436
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x27067
1462A
Favorite Sequence
implementation
,
two pointers
800
x41485
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