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Codeforces Round 1006 (Div. 3)
2 days
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*combine tags by OR
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
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5694
313B
Ilya and Queries
dp
,
implementation
1100
x46389
313A
Ilya and Bank Account
implementation
,
number theory
900
x58471
312B
Archer
math
,
probabilities
1300
x11972
312A
Whose sentence is it?
implementation
,
strings
1100
x5089
311E
Biologist
flows
2300
x1288
311D
Interval Cubing
data structures
,
math
2600
x681
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x493
311B
Cats Transport
data structures
,
dp
2400
x3619
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4090
309E
Sheep
binary search
,
greedy
2900
x235
309D
Tennis Rackets
brute force
,
geometry
2700
x176
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1381
309B
Context Advertising
dp
,
two pointers
2100
x737
309A
Morning run
binary search
,
math
,
two pointers
2000
x494
306D
Polygon
constructive algorithms
,
geometry
2300
x298
306C
White, Black and White Again
combinatorics
,
number theory
2100
x514
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x459
306A
Candies
implementation
800
x7251
305E
Playing with String
games
2300
x655
305D
Olya and Graph
combinatorics
,
math
2200
x517
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2487
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2165
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4913
304B
Calendar
brute force
,
implementation
1300
x3009
304A
Pythagorean Theorem II
brute force
,
math
1200
x11019
303E
Random Ranking
dp
,
math
,
probabilities
3000
x331
303D
Rotatable Number
math
,
number theory
2600
x303
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x899
303B
Rectangle Puzzle II
implementation
,
math
1700
x1348
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x8074
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8560
302A
Eugeny and Array
implementation
800
x9213
301E
Yaroslav and Arrangements
dp
2800
x371
301D
Yaroslav and Divisors
data structures
2200
x2537
301C
Yaroslav and Algorithm
constructive algorithms
2500
x479
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2438
301A
Yaroslav and Sequence
constructive algorithms
1800
x3106
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1053
300D
Painting Square
dp
,
fft
2300
x770
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9975
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6531
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x23615
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5562
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x8357
298B
Sail
brute force
,
greedy
,
implementation
1200
x14561
298A
Snow Footprints
greedy
,
implementation
1300
x11114
297E
Mystic Carvings
data structures
3000
x387
297D
Color the Carpet
constructive algorithms
2500
x595
297C
Splitting the Uniqueness
constructive algorithms
2400
x974
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3567
297A
Parity Game
constructive algorithms
1700
x3681
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2369
296A
Yaroslav and Permutations
greedy
,
math
1100
x23962
295E
Yaroslav and Points
data structures
2500
x714
295D
Greg and Caves
combinatorics
,
dp
2400
x673
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1781
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x14964
295A
Greg and Array
data structures
,
implementation
1400
x19324
294E
Shaass the Great
dp
,
trees
2300
x986
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x366
294C
Shaass and Lights
combinatorics
,
number theory
1900
x3923
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4617
294A
Shaass and Oskols
implementation
,
math
800
x24572
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x1523
293D
Ksusha and Square
geometry
,
math
,
probabilities
,
two pointers
2700
x241
293C
Cube Problem
brute force
,
math
,
number theory
2400
x582
293B
Distinct Paths
brute force
,
combinatorics
2700
x887
293A
Weird Game
games
,
greedy
1500
x2950
292E
Copying Data
data structures
1900
x4294
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2472
292C
Beautiful IP Addresses
brute force
2000
x1176
292B
Network Topology
graphs
,
implementation
1200
x8830
292A
SMSC
implementation
1100
x2730
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1380
291D
Parallel Programming
*special problem
,
greedy
1600
x1486
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1709
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x3039
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x6191
290F
Greedy Petya
*special problem
,
dfs and similar
,
graphs
,
greedy
2800
x135
290E
HQ
*special problem
,
constructive algorithms
2500
x206
290D
Orange
*special problem
,
implementation
1400
x1820
290C
WTF?
*special problem
,
graph matchings
,
implementation
,
trees
1700
x1556
290B
QR code
*special problem
,
implementation
1500
x2458
290A
Mysterious strings
*special problem
,
implementation
1400
x3022
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x17766
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x9561
288E
Polo the Penguin and Lucky Numbers
dp
,
implementation
,
math
2800
x301
288D
Polo the Penguin and Trees
combinatorics
,
dfs and similar
,
trees
2400
x763
288C
Polo the Penguin and XOR operation
implementation
,
math
1700
x2352
288B
Polo the Penguin and Houses
combinatorics
1500
x2974
288A
Polo the Penguin and Strings
greedy
1300
x6538
287B
Pipeline
binary search
,
math
1700
x10273
287A
IQ Test
brute force
,
implementation
1100
x20461
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x840
286D
Tourists
data structures
,
sortings
2600
x380
286C
Main Sequence
greedy
,
implementation
2100
x1542
286B
Shifting
implementation
2200
x1128
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3212
285E
Positions in Permutations
combinatorics
,
dp
,
math
2600
x1031
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