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Codeforces Round 973 (Div. 2)
02:04:25
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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
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
513D2
Constrained Tree
constructive algorithms
,
data structures
2600
x379
513D1
Constrained Tree
dfs and similar
2400
x616
513C
Second price auction
bitmasks
,
probabilities
2000
x1536
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2627
513B1
Permutations
brute force
1400
x3617
513A
Game
constructive algorithms
,
math
800
x20139
512E
Fox And Polygon
constructive algorithms
,
divide and conquer
2900
x520
512D
Fox And Travelling
dp
,
trees
2900
x968
510E
Fox And Dinner
flows
2300
x2189
510D
Fox And Jumping
bitmasks
,
brute force
,
dp
,
math
1900
x5399
510C
Fox And Names
dfs and similar
,
graphs
,
sortings
1600
x16126
510B
Fox And Two Dots
dfs and similar
1500
x13879
510A
Fox And Snake
implementation
800
x82714
509F
Progress Monitoring
dp
,
trees
2300
x1064
509E
Pretty Song
math
,
strings
2000
x1788
509D
Restoring Numbers
constructive algorithms
,
math
2200
x741
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x2064
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9606
509A
Maximum in Table
brute force
,
implementation
800
x38122
508E
Arthur and Brackets
dp
,
greedy
2200
x1750
508D
Tanya and Password
dfs and similar
,
graphs
2500
x3382
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4456
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22560
508A
Pasha and Pixels
brute force
1100
x7863
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2850
507D
The Maths Lecture
dp
,
implementation
2200
x1749
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4321
507B
Amr and Pins
geometry
,
math
1400
x24463
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x18223
506E
Mr. Kitayuta's Gift
combinatorics
,
dp
,
matrices
,
strings
3000
x731
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2122
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x1392
505D
Mr. Kitayuta's Technology
dfs and similar
2200
x2514
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6335
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12865
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6660
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x908
504D
Misha and XOR
bitmasks
2700
x303
501E
Misha and Palindrome Degree
binary search
,
combinatorics
,
implementation
2500
x914
501D
Misha and Permutations Summation
data structures
2000
x2391
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5640
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x16077
501A
Contest
implementation
900
x22698
500G
New Year Running
number theory
,
trees
3200
x157
500F
New Year Shopping
divide and conquer
,
dp
2700
x731
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1425
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3112
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5802
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8854
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x52703
499B
Lecture
implementation
,
strings
1000
x38993
499A
Watching a movie
greedy
,
implementation
1000
x13926
498E
Stairs and Lines
dp
,
matrices
2700
x465
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1110
498C
Array and Operations
flows
,
graph matchings
,
number theory
2100
x3399
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1166
498A
Crazy Town
geometry
1700
x6442
497E
Subsequences Return
dp
,
matrices
2900
x285
497D
Gears
brute force
,
geometry
,
math
2900
x228
496E
Distributing Parts
greedy
,
sortings
2100
x1654
496D
Tennis Game
binary search
1900
x3009
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7713
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5861
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16342
495B
Modular Equations
math
,
number theory
1600
x6882
495A
Digital Counter
implementation
1100
x8445
494E
Sharti
data structures
,
games
3200
x316
494D
Birthday
data structures
,
dfs and similar
,
dp
,
trees
2700
x524
494C
Helping People
dp
,
probabilities
2600
x851
494B
Obsessive String
dp
,
strings
2000
x2693
494A
Treasure
greedy
1500
x6197
493E
Vasya and Polynomial
math
2800
x483
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9643
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6782
493B
Vasya and Wrestling
implementation
1400
x13262
493A
Vasya and Football
implementation
1300
x6100
492E
Vanya and Field
math
2000
x1620
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3152
492C
Vanya and Exams
greedy
,
sortings
1400
x14015
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x74846
492A
Vanya and Cubes
implementation
800
x49776
491C
Deciphering
flows
,
graph matchings
2300
x409
491B
New York Hotel
greedy
,
math
2100
x552
491A
Up the hill
constructive algorithms
,
implementation
1000
x2895
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1677
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1592
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2130
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9060
490B
Queue
dsu
,
implementation
1500
x5973
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x58831
489F
Special Matrices
combinatorics
,
dp
2100
x1664
489E
Hiking
binary search
,
dp
2300
x1027
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6663
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x45985
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x48469
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x10025
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2117
488A
Giga Tower
brute force
1100
x14236
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2319
487D
Conveyor Belts
data structures
2700
x890
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