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Rayan
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Before contest
Codeforces Round 1002 (Div. 2)
46:37:31
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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
501A
Contest
implementation
900
x23124
500G
New Year Running
number theory
,
trees
3200
x157
500F
New Year Shopping
divide and conquer
,
dp
2700
x753
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1476
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3140
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5846
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8988
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x54810
499B
Lecture
implementation
,
strings
1000
x40364
499A
Watching a movie
greedy
,
implementation
1000
x14064
498E
Stairs and Lines
dp
,
matrices
2700
x485
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1143
498C
Array and Operations
flows
,
graph matchings
,
number theory
2100
x3574
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1204
498A
Crazy Town
geometry
1700
x6519
497E
Subsequences Return
dp
,
matrices
2900
x288
497D
Gears
brute force
,
geometry
,
math
2900
x231
496E
Distributing Parts
greedy
,
sortings
2100
x1681
496D
Tennis Game
binary search
1900
x3048
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7808
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5966
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16608
495B
Modular Equations
math
,
number theory
1600
x7292
495A
Digital Counter
implementation
1100
x8588
494E
Sharti
data structures
,
games
3200
x324
494D
Birthday
data structures
,
dfs and similar
,
dp
,
trees
2700
x636
494C
Helping People
dp
,
probabilities
2600
x885
494B
Obsessive String
dp
,
strings
2000
x2771
494A
Treasure
greedy
1500
x6310
493E
Vasya and Polynomial
math
2800
x492
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9773
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6889
493B
Vasya and Wrestling
implementation
1400
x13461
493A
Vasya and Football
implementation
1300
x6149
492E
Vanya and Field
math
2000
x1653
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3191
492C
Vanya and Exams
greedy
,
sortings
1400
x14335
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x78272
492A
Vanya and Cubes
implementation
800
x52822
491C
Deciphering
flows
,
graph matchings
2300
x424
491B
New York Hotel
greedy
,
math
2100
x576
491A
Up the hill
constructive algorithms
,
implementation
1000
x3016
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1755
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1617
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2165
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x9146
490B
Queue
dsu
,
implementation
1500
x6092
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x61311
489F
Special Matrices
combinatorics
,
dp
2100
x1704
489E
Hiking
binary search
,
dp
2300
x1044
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6739
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x47267
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x50308
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x10163
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2128
488A
Giga Tower
brute force
1100
x14421
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2444
487D
Conveyor Belts
data structures
2700
x914
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x2830
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3600
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3781
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2330
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x4098
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11843
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x18056
486A
Calculating Function
implementation
,
math
800
x125707
485B
Valuable Resources
brute force
,
greedy
1300
x6558
485A
Factory
implementation
,
math
,
matrices
1400
x8389
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2412
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2707
484C
Strange Sorting
implementation
,
math
2600
x599
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x7152
484A
Bits
bitmasks
,
constructive algorithms
1700
x11724
483B
Friends and Presents
binary search
,
math
1800
x4112
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x23532
482E
ELCA
data structures
,
trees
3200
x179
482D
Random Function and Tree
combinatorics
,
dp
,
trees
2700
x544
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x956
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6709
482A
Diverse Permutation
constructive algorithms
,
greedy
1200
x9774
480E
Parking Lot
data structures
,
divide and conquer
2800
x576
480D
Parcels
dp
,
graphs
2600
x463
479E
Riding in a Lift
combinatorics
,
dp
1900
x5216
479D
Long Jumps
binary search
,
greedy
,
implementation
1700
x4855
479C
Exams
greedy
,
sortings
1400
x30296
479B
Towers
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x7977
479A
Expression
brute force
,
math
1000
x97675
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x221
478D
Red-Green Towers
dp
2000
x6177
478C
Table Decorations
greedy
1800
x18667
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x37453
478A
Initial Bet
implementation
1100
x25981
477E
Dreamoon and Notepad
data structures
3100
x135
477D
Dreamoon and Binary
dp
,
strings
2700
x533
476E
Dreamoon and Strings
dp
,
strings
2200
x1993
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4726
476C
Dreamoon and Sums
math
1600
x5772
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x31829
476A
Dreamoon and Stairs
implementation
,
math
1000
x45350
475F
Meta-universe
data structures
2900
x234
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