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Codeforces Round 1002 (Div. 2)
2 days
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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
328B
Sheldon and Ice Pieces
greedy
1500
x1387
328A
IQ Test
implementation
1800
x2143
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1435
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2328
327C
Magic Five
combinatorics
,
math
1700
x3262
327B
Hungry Sequence
math
1200
x20080
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x43273
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x842
325D
Reclamation
dsu
2900
x545
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x352
325B
Stadium and Games
binary search
,
math
1800
x1583
325A
Square and Rectangles
implementation
1500
x2169
323C
Two permutations
data structures
2400
x616
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x407
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x798
322B
Ciel and Flowers
combinatorics
,
math
1600
x11984
322A
Ciel and Dancing
greedy
1000
x8294
321E
Ciel and Gondolas
data structures
,
divide and conquer
,
dp
2600
x5216
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x553
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x7622
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x3225
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3660
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7329
320A
Magic Numbers
brute force
,
greedy
900
x39962
319E
Ping-Pong
data structures
3000
x669
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x677
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x5384
319B
Psychos in a Line
data structures
,
implementation
1900
x4270
319A
Malek Dance Club
combinatorics
,
math
1600
x2850
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7762
318A
Even Odds
math
900
x119514
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x157
317D
Game with Powers
dp
,
games
2300
x1096
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x513
317B
Ants
brute force
,
implementation
2000
x1610
317A
Perfect Pair
brute force
1600
x4710
316G3
Good Substrings
string suffix structures
2400
x503
316G2
Good Substrings
string suffix structures
2200
x477
316G1
Good Substrings
hashing
,
strings
1700
x979
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x183
316F2
Suns and Rays
2300
x167
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x181
316E3
Summer Homework
data structures
,
math
2300
x535
316E2
Summer Homework
data structures
,
math
2300
x401
316E1
Summer Homework
brute force
,
data structures
1500
x1489
316D3
PE Lesson
dp
,
math
2400
x611
316D2
PE Lesson
dp
2300
x464
316D1
PE Lesson
brute force
,
dp
2300
x535
316C2
Tidying Up
flows
,
graph matchings
2300
x637
316C1
Tidying Up
flows
2200
x562
316B2
EKG
dfs and similar
,
dp
1600
x1603
316B1
EKG
brute force
,
dfs and similar
1500
x1391
316A2
Special Task
math
1400
x2163
316A1
Special Task
greedy
1100
x2697
315B
Sereja and Array
implementation
1200
x7075
315A
Sereja and Bottles
brute force
1400
x11355
314E
Sereja and Squares
dp
2900
x373
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x536
314C
Sereja and Subsequences
data structures
,
dp
2000
x1850
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1530
314A
Sereja and Contest
implementation
1600
x2087
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x558
313D
Ilya and Roads
dp
2100
x1501
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5688
313B
Ilya and Queries
dp
,
implementation
1100
x45962
313A
Ilya and Bank Account
implementation
,
number theory
900
x58071
312B
Archer
math
,
probabilities
1300
x11912
312A
Whose sentence is it?
implementation
,
strings
1100
x5031
311E
Biologist
flows
2300
x1258
311D
Interval Cubing
data structures
,
math
2600
x678
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x493
311B
Cats Transport
data structures
,
dp
2400
x3592
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4084
309E
Sheep
binary search
,
greedy
2900
x233
309D
Tennis Rackets
brute force
,
geometry
2700
x176
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1377
309B
Context Advertising
dp
,
two pointers
2100
x737
309A
Morning run
binary search
,
math
,
two pointers
2000
x493
306D
Polygon
constructive algorithms
,
geometry
2300
x296
306C
White, Black and White Again
combinatorics
,
number theory
2100
x503
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x454
306A
Candies
implementation
800
x7180
305E
Playing with String
games
2300
x650
305D
Olya and Graph
combinatorics
,
math
2200
x516
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2481
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2162
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4896
304B
Calendar
brute force
,
implementation
1300
x3008
304A
Pythagorean Theorem II
brute force
,
math
1200
x10942
303E
Random Ranking
dp
,
math
,
probabilities
3000
x327
303D
Rotatable Number
math
,
number theory
2600
x303
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x898
303B
Rectangle Puzzle II
implementation
,
math
1700
x1348
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x8042
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8365
302A
Eugeny and Array
implementation
800
x9195
301E
Yaroslav and Arrangements
dp
2800
x369
301D
Yaroslav and Divisors
data structures
2200
x2513
301C
Yaroslav and Algorithm
constructive algorithms
2500
x477
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2422
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