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Codeforces Round 1000 (Div. 2)
07:42:38
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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
2061I
Kevin and Nivek
divide and conquer
,
dp
x13
2061H2
Kevin and Stones (Hard Version)
flows
,
graphs
2061H1
Kevin and Stones (Easy Version)
flows
,
graph matchings
,
graphs
x32
2061G
Kevin and Teams
constructive algorithms
,
expression parsing
,
fft
,
flows
,
graph matchings
,
graphs
,
implementation
,
interactive
,
math
,
number theory
x201
2061F2
Kevin and Binary String (Hard Version)
data structures
,
dp
x39
2061F1
Kevin and Binary String (Easy Version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
fft
,
flows
,
greedy
,
implementation
,
meet-in-the-middle
,
string suffix structures
,
strings
x1231
2061E
Kevin and And
bitmasks
,
brute force
,
dp
,
greedy
,
implementation
,
sortings
x2017
2061D
Kevin and Numbers
data structures
,
divide and conquer
,
greedy
x5802
2061C
Kevin and Puzzle
2-sat
,
combinatorics
,
dp
x5219
2061B
Kevin and Geometry
geometry
,
greedy
,
implementation
,
math
x9315
2061A
Kevin and Arithmetic
math
x14762
2060G
Bugged Sort
dp
,
greedy
,
sortings
x457
2060F
Multiplicative Arrays
combinatorics
,
dp
,
number theory
x1103
2060E
Graph Composition
dfs and similar
,
dsu
,
graphs
,
greedy
x6460
2060D
Subtract Min Sort
greedy
x17836
2060C
Game of Mathletes
games
,
greedy
,
sortings
,
two pointers
x20792
2060B
Farmer John's Card Game
greedy
,
sortings
x19492
2060A
Fibonacciness
brute force
x28588
2057H
Coffee Break
data structures
,
greedy
,
math
3500
x118
2057G
Secret Message
constructive algorithms
,
dfs and similar
,
math
3000
x439
2057F
Formation
binary search
,
data structures
,
dp
,
sortings
,
two pointers
3300
x171
2057E2
Another Exercise on Graphs (hard version)
binary search
,
dfs and similar
,
dp
,
dsu
,
graphs
,
shortest paths
,
sortings
2500
x1299
2057E1
Another Exercise on Graphs (Easy Version)
binary search
,
brute force
,
dp
,
dsu
,
graphs
,
shortest paths
,
sortings
2300
x1832
2057D
Gifts Order
data structures
,
greedy
,
implementation
,
math
,
matrices
2000
x3940
2057C
Trip to the Olympiad
bitmasks
,
constructive algorithms
,
greedy
,
math
1500
x10313
2057B
Gorilla and the Exam
greedy
,
sortings
1000
x17757
2057A
MEX Table
constructive algorithms
,
math
800
x23302
2056F2
Xor of Median (Hard Version)
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
x88
2056F1
Xor of Median (Easy Version)
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
x143
2056E
Nested Segments
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
x490
2056D
Unique Median
binary search
,
brute force
,
combinatorics
,
data structures
,
divide and conquer
,
dp
x1990
2056C
Palindromic Subsequences
brute force
,
constructive algorithms
,
math
x13051
2056B
Find the Permutation
brute force
,
dfs and similar
,
graphs
,
implementation
,
sortings
x12895
2056A
Shape Perimeter
constructive algorithms
,
math
x21861
2055F
Cosmic Divide
brute force
,
geometry
,
hashing
,
math
,
strings
x44
2055E
Haystacks
brute force
,
constructive algorithms
,
data structures
,
greedy
,
sortings
x251
2055D
Scarecrow
greedy
,
implementation
,
math
x3137
2055C
The Trail
brute force
,
constructive algorithms
,
greedy
,
math
,
two pointers
x12603
2055B
Crafting
constructive algorithms
,
greedy
,
sortings
x21048
2055A
Two Frogs
constructive algorithms
,
games
,
greedy
,
math
x26964
2053I2
Affectionate Arrays (Hard Version)
data structures
,
dp
,
graphs
,
greedy
,
math
,
shortest paths
,
two pointers
3500
x32
2053I1
Affectionate Arrays (Easy Version)
data structures
,
dp
,
greedy
2800
x349
2053H
Delicate Anti-monotonous Operations
constructive algorithms
,
implementation
3500
x41
2053G
Naive String Splits
binary search
,
brute force
,
greedy
,
hashing
,
math
,
number theory
,
strings
3400
x140
2053F
Earnest Matrix Complement
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
math
2600
x724
2053E
Resourceful Caterpillar Sequence
dfs and similar
,
dp
,
games
,
graphs
,
greedy
,
trees
1900
x3348
2053D
Refined Product Optimality
binary search
,
data structures
,
greedy
,
math
,
schedules
,
sortings
1700
x5958
2053C
Bewitching Stargazer
bitmasks
,
divide and conquer
,
dp
,
math
1500
x9319
2053B
Outstanding Impressionist
binary search
,
brute force
,
data structures
,
greedy
1200
x13341
2053A
Tender Carpenter
dp
,
geometry
,
greedy
,
math
800
x18446
2052M
Managing Cluster
dp
,
graphs
,
math
,
trees
2700
x257
2052L
Legacy Screensaver
2900
x85
2052K
Knowns and Unknowns
2800
x69
2052J
Judicious Watching
binary search
,
greedy
,
sortings
2000
x882
2052I
Incompetent Delivery Guy
graphs
,
shortest paths
2800
x86
2052H
Hunting Hoglins in Hogwarts
interactive
3500
x33
2052G
Geometric Balance
data structures
,
geometry
,
implementation
2800
x130
2052F
Fix Flooded Floor
constructive algorithms
,
dp
,
graphs
1700
x1770
2052E
Expression Correction
brute force
,
expression parsing
,
strings
1900
x920
2052D
DAG Serialization
brute force
,
graphs
2100
x669
2052C
Cactus without Bridges
constructive algorithms
,
math
3500
x21
2052B
BitBitJump
2400
x301
2052A
Adrenaline Rush
constructive algorithms
1600
x2117
2051G
Snakes
bitmasks
,
dp
,
dsu
,
graphs
2100
x1478
2051F
Joker
brute force
,
greedy
,
implementation
,
math
2000
x2730
2051E
Best Price
binary search
,
brute force
,
data structures
,
greedy
,
sortings
1600
x8053
2051D
Counting Pairs
binary search
,
sortings
,
two pointers
1200
x16507
2051C
Preparing for the Exam
constructive algorithms
,
implementation
1000
x20669
2051B
Journey
binary search
,
math
800
x28904
2051A
Preparing for the Olympiad
greedy
800
x28139
2050G
Tree Destruction
dfs and similar
,
dp
,
trees
1900
x3612
2050F
Maximum modulo equality
data structures
,
divide and conquer
,
math
,
number theory
1700
x6405
2050E
Three Strings
dp
,
implementation
,
strings
1500
x9982
2050D
Digital string maximization
brute force
,
greedy
,
math
,
strings
1300
x14314
2050C
Uninteresting Number
brute force
,
dp
,
math
1200
x18516
2050B
Transfusion
brute force
,
greedy
,
math
1100
x21393
2050A
Line Breaks
implementation
800
x30368
2049F
MEX OR Mania
bitmasks
,
brute force
,
data structures
,
dsu
,
implementation
2700
x368
2049E
Broken Queries
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
implementation
,
interactive
2400
x1124
2049D
Shift + Esc
brute force
,
dp
1900
x4234
2049C
MEX Cycle
brute force
,
constructive algorithms
,
greedy
,
implementation
1500
x10140
2049B
pspspsps
brute force
,
constructive algorithms
,
graph matchings
,
implementation
1300
x14487
2049A
MEX Destruction
greedy
,
implementation
800
x20374
2048I2
Kevin and Puzzle (Hard Version)
bitmasks
,
fft
,
math
3500
x17
2048I1
Kevin and Puzzle (Easy Version)
constructive algorithms
3500
x54
2048H
Kevin and Strange Operation
data structures
,
dp
3100
x141
2048G
Kevin and Matrices
brute force
,
combinatorics
,
dp
,
math
2800
x432
2048F
Kevin and Math Class
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
,
math
,
trees
2500
x940
2048E
Kevin and Bipartite Graph
constructive algorithms
,
graphs
,
greedy
2000
x2573
2048D
Kevin and Competition Memories
binary search
,
brute force
,
data structures
,
greedy
,
sortings
,
two pointers
1600
x6380
2048C
Kevin and Binary Strings
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
1200
x12074
2048B
Kevin and Permutation
constructive algorithms
,
greedy
900
x16696
2048A
Kevin and Combination Lock
brute force
,
greedy
,
implementation
,
math
,
number theory
800
x19483
2047B
Replace Character
brute force
,
combinatorics
,
greedy
,
strings
900
x13944
2047A
Alyona and a Square Jigsaw Puzzle
implementation
,
math
800
x14594
2046F2
Yandex Cuneiform (Hard Version)
constructive algorithms
,
data structures
,
greedy
,
implementation
3500
x39
2046F1
Yandex Cuneiform (Easy Version)
constructive algorithms
,
data structures
,
greedy
3300
x59
2046E2
Cheops and a Contest (Hard Version)
greedy
,
implementation
3500
x37
2046E1
Cheops and a Contest (Easy Version)
constructive algorithms
,
greedy
2900
x132
2046D
For the Emperor!
flows
,
graphs
3100
x274
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