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Codeforces Round 941 (Div. 1)
3 days
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Codeforces Round 941 (Div. 2)
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brute force
combine-tags-by-or
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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
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matrices
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probabilities
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Problems
#
Name
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x64
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x64
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x67
1302F
Keep talking and nobody explodes -- easy
bitmasks
,
brute force
,
expression parsing
x72
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x73
73F
Plane of Tanks
brute force
,
geometry
2900
x74
1949E
Damage per Second
brute force
,
math
x75
1896H1
Cyclic Hamming (Easy Version)
brute force
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x77
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x79
1949A
Grove
brute force
,
dfs and similar
,
dp
,
geometry
,
probabilities
x80
126E
Pills
brute force
,
flows
2900
x82
1896H2
Cyclic Hamming (Hard Version)
brute force
,
dp
,
fft
,
math
,
number theory
3500
x84
1097H
Mateusz and an Infinite Sequence
bitmasks
,
brute force
,
dp
,
strings
3400
x92
109E
Lucky Interval
brute force
,
math
2700
x98
1545F
AquaMoon and Potatoes
brute force
,
data structures
,
dp
3500
x102
1854F
Mark and Spaceship
brute force
,
dp
3500
x110
1120E
The very same Munchhausen
brute force
2600
x110
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x115
1769D3
Игра в Девятку III
*special problem
,
brute force
2300
x115
1508F
Optimal Encoding
brute force
,
data structures
3500
x116
865E
Hex Dyslexia
bitmasks
,
brute force
,
dp
,
graphs
3300
x118
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
1779H
Olympic Team Building
brute force
,
meet-in-the-middle
3500
x130
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x130
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x132
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x135
1017H
The Films
brute force
3300
x137
1167G
Low Budget Inception
brute force
,
geometry
3100
x146
1320F
Blocks and Sensors
brute force
3500
x149
72E
Ali goes shopping
*special problem
,
brute force
,
strings
1800
x150
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x152
156E
Mrs. Hudson's Pancakes
brute force
,
dp
3000
x160
138E
Hellish Constraints
brute force
,
dp
,
two pointers
2900
x164
1796F
Strange Triples
brute force
,
math
,
number theory
2900
x167
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x169
309D
Tennis Rackets
brute force
,
geometry
2700
x171
86E
Long sequence
brute force
,
math
,
matrices
2700
x178
105E
Lift and Throw
brute force
2500
x179
44I
Toys
brute force
,
combinatorics
2300
x181
391C1
The Tournament
brute force
x182
1753F
Minecraft Series
brute force
,
two pointers
3500
x185
1769D2
Игра в Девятку II
*special problem
,
brute force
2200
x186
1210F1
Marek and Matching (easy version)
brute force
,
probabilities
3100
x186
1271F
Divide The Students
brute force
2700
x187
1210F2
Marek and Matching (hard version)
brute force
,
probabilities
3200
x187
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x189
363E
Two Circles
brute force
,
data structures
,
implementation
2500
x192
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x196
391D1
Supercollider
brute force
x201
478E
Wavy numbers
brute force
,
dfs and similar
,
meet-in-the-middle
,
sortings
2900
x204
1515H
Phoenix and Bits
bitmasks
,
brute force
,
data structures
,
sortings
3500
x211
575C
Party
bitmasks
,
brute force
,
graph matchings
2700
x211
1578J
Just Kingdom
brute force
,
data structures
,
dfs and similar
3100
x217
497D
Gears
brute force
,
geometry
,
math
2900
x224
1569F
Palindromic Hamiltonian Path
brute force
,
dfs and similar
,
dp
,
graphs
,
hashing
3000
x226
164D
Minimum Diameter
binary search
,
brute force
3100
x229
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x229
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x232
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x233
869D
The Overdosing Ubiquity
brute force
,
dfs and similar
,
graphs
2800
x235
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x237
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x238
152D
Frames
brute force
2600
x238
217D
Bitonix' Patrol
bitmasks
,
brute force
,
combinatorics
,
dfs and similar
,
math
2900
x245
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x249
97A
Domino
brute force
,
implementation
2400
x250
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x258
666D
Chain Reaction
brute force
,
geometry
3000
x258
241F
Race
brute force
,
implementation
2300
x259
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x260
1540D
Inverse Inversions
binary search
,
brute force
,
data structures
3200
x261
394D
Physical Education and Buns
brute force
,
implementation
,
math
x261
1031F
Familiar Operations
brute force
,
graphs
,
math
2800
x264
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x265
105C
Item World
brute force
,
implementation
,
sortings
2200
x269
753C
Interactive Bulls and Cows (Hard)
brute force
,
constructive algorithms
,
interactive
2500
x279
933D
A Creative Cutout
brute force
,
combinatorics
,
math
2900
x280
1599J
Bob's Beautiful Array
bitmasks
,
brute force
,
greedy
2600
x283
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x283
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x289
135D
Cycle
brute force
,
dfs and similar
,
implementation
2500
x293
991F
Concise and clear
brute force
,
greedy
,
implementation
,
math
2700
x294
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x297
568D
Sign Posts
brute force
,
geometry
,
math
2800
x298
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x298
68C
Synchrophasotron
brute force
2200
x303
335D
Rectangles and Square
brute force
,
dp
2400
x304
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x307
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x311
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x312
1671F
Permutation Counting
brute force
,
combinatorics
,
dp
,
fft
,
math
2700
x314
1525F
Goblins And Gnomes
brute force
,
dp
,
flows
,
graph matchings
2800
x316
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x317
1923F
Shrink-Reverse
binary search
,
brute force
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x319
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x320
1192C
Cubeword
*special problem
,
brute force
,
dp
,
meet-in-the-middle
x322
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x325
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x325
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x326
1531E2
Сортировка слиянием
*special problem
,
*special problem
,
brute force
x331
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