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Codeforces Round 1000 (Div. 2)
39:19:01
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Difficulty:
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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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Problems
#
Name
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3905
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x7470
1611D
Weights Assignment For Tree Edges
constructive algorithms
,
trees
1500
x10053
1610I
Mashtali vs AtCoder
games
,
trees
3100
x288
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x515
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x494
1610F
Mashtali: a Space Oddysey
constructive algorithms
,
dfs and similar
,
graphs
3000
x550
1610E
AmShZ and G.O.A.T.
binary search
,
brute force
,
greedy
,
implementation
,
math
2300
x1722
1610D
Not Quite Lee
combinatorics
,
dp
,
math
,
number theory
2000
x2789
1610C
Keshi Is Throwing a Party
binary search
,
greedy
1600
x12211
1609H
Pushing Robots
3500
x94
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x426
1609F
Interesting Sections
data structures
,
divide and conquer
,
meet-in-the-middle
,
two pointers
2800
x817
1609E
William The Oblivious
bitmasks
,
data structures
,
dp
,
matrices
2400
x2176
1609D
Social Network
dsu
,
graphs
,
greedy
,
implementation
,
trees
1600
x7443
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9881
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x170
1608F
MEX counting
combinatorics
,
dp
,
implementation
3200
x647
1608E
The Cells on the Paper
binary search
,
implementation
,
sortings
2800
x446
1608D
Dominoes
combinatorics
,
fft
,
graphs
,
math
,
number theory
2400
x1424
1608C
Game Master
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
two pointers
1700
x6825
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1269
1607G
Banquet Preparations 1
greedy
2200
x1589
1607F
Robot on the Board 2
brute force
,
dfs and similar
,
graphs
,
implementation
2300
x1977
1607E
Robot on the Board 1
implementation
1600
x9472
1606F
Tree Queries
brute force
,
dp
,
trees
2800
x570
1606E
Arena
combinatorics
,
dp
,
math
2100
x3629
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1476
1606C
Banknotes
greedy
,
number theory
1400
x14351
1605F
PalindORme
combinatorics
,
dp
2900
x314
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x1071
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2989
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x17301
1603F
October 18, 2017
combinatorics
,
dp
,
implementation
,
math
2700
x291
1603E
A Perfect Problem
combinatorics
,
dp
,
math
3200
x490
1603D
Artistic Partition
divide and conquer
,
dp
,
number theory
3000
x714
1603C
Extreme Extension
dp
,
greedy
,
math
,
number theory
2300
x2088
1603B
Moderate Modular Mode
constructive algorithms
,
math
,
number theory
1600
x13887
1601F
Two Sorts
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
3400
x190
1601E
Phys Ed Online
data structures
,
dp
,
greedy
2900
x497
1601D
Difficult Mountain
data structures
,
dp
,
greedy
,
sortings
2700
x1505
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x2090
1601B
Frog Traveler
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
two pointers
1900
x5074
1600J
Robot Factory
bitmasks
,
dfs and similar
1400
x4084
1600F
Party Organization
brute force
,
math
,
probabilities
2300
x515
1600E
Array Game
games
,
greedy
,
two pointers
1900
x2171
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x309
1599I
Desert
data structures
,
graphs
2700
x121
1599H
Hidden Fortress
interactive
,
math
2100
x1091
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x372
1599F
Mars
hashing
2700
x350
1599E
Two Arrays
data structures
,
matrices
3200
x69
1599D
Bubble Popping
3200
x30
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1706
1599B
Restaurant Game
3100
x143
1599A
Weights
constructive algorithms
,
greedy
,
two pointers
2600
x698
1598G
The Sum of Good Numbers
hashing
,
math
,
string suffix structures
,
strings
3200
x348
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1457
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2356
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8875
1594F
Ideal Farm
constructive algorithms
,
math
2400
x1396
1594E2
Rubik's Cube Coloring (hard version)
brute force
,
dp
,
implementation
,
math
,
trees
2300
x1506
1594D
The Number of Imposters
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
graphs
1700
x7694
1593G
Changing Brackets
constructive algorithms
,
data structures
,
dp
,
greedy
2200
x1749
1593F
Red-Black Number
dfs and similar
,
dp
,
implementation
,
math
,
meet-in-the-middle
2100
x2492
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x12866
1593D2
Half of Same
brute force
,
math
,
number theory
1900
x5119
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x791
1592F1
Alice and Recoloring 1
constructive algorithms
,
greedy
2600
x924
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1696
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2358
1592C
Bakry and Partitioning
bitmasks
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
trees
1700
x8198
1588F
Jumping Through the Array
binary search
,
data structures
,
graphs
,
two pointers
3500
x320
1586I
Omkar and Mosaic
combinatorics
,
constructive algorithms
,
math
3500
x205
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x210
1585F
Non-equal Neighbours
combinatorics
,
dp
,
math
2400
x1277
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x1086
1585D
Yet Another Sorting Problem
data structures
,
math
1900
x3942
1584G
Eligible Segments
geometry
3200
x218
1584F
Strange LCS
bitmasks
,
dp
,
graphs
,
greedy
,
strings
2600
x1005
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1318
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3733
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x346
1583G
Omkar and Time Travel
data structures
,
math
3000
x470
1583F
Defender of Childhood Dreams
bitmasks
,
constructive algorithms
,
divide and conquer
2500
x1358
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2271
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5468
1583C
Omkar and Determination
data structures
,
dp
1700
x7012
1582G
Kuzya and Homework
data structures
,
number theory
2600
x604
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1877
1582F1
Korney Korneevich and XOR (easy version)
bitmasks
,
dp
,
greedy
1800
x5815
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3834
1582D
Vupsen, Pupsen and 0
constructive algorithms
,
math
1600
x10749
1580F
Problems for Codeforces
combinatorics
,
fft
,
math
3300
x136
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x77
1580D
Subsequence
brute force
,
divide and conquer
,
dp
,
greedy
,
trees
2900
x960
1580C
Train Maintenance
brute force
,
data structures
,
implementation
2200
x1860
1580B
Mathematics Curriculum
brute force
,
combinatorics
,
dp
,
trees
2600
x1080
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3730
1579G
Minimal Coverage
dp
2200
x2458
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