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IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
16:40:05
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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
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
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Status
Standings
Custom test
Problems
#
Name
319B
Psychos in a Line
data structures
,
implementation
1900
x4262
319A
Malek Dance Club
combinatorics
,
math
1600
x2845
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7753
318A
Even Odds
math
900
x118830
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x157
317D
Game with Powers
dp
,
games
2300
x1094
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x510
317B
Ants
brute force
,
implementation
2000
x1609
317A
Perfect Pair
brute force
1600
x4697
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
x534
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
x561
316B2
EKG
dfs and similar
,
dp
1600
x1602
316B1
EKG
brute force
,
dfs and similar
1500
x1390
316A2
Special Task
math
1400
x2162
316A1
Special Task
greedy
1100
x2697
315B
Sereja and Array
implementation
1200
x7071
315A
Sereja and Bottles
brute force
1400
x11323
314E
Sereja and Squares
dp
2900
x373
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x533
314C
Sereja and Subsequences
data structures
,
dp
2000
x1846
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
x557
313D
Ilya and Roads
dp
2100
x1496
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5681
313B
Ilya and Queries
dp
,
implementation
1100
x45779
313A
Ilya and Bank Account
implementation
,
number theory
900
x57861
312B
Archer
math
,
probabilities
1300
x11849
312A
Whose sentence is it?
implementation
,
strings
1100
x5015
311E
Biologist
flows
2300
x1257
311D
Interval Cubing
data structures
,
math
2600
x677
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x490
311B
Cats Transport
data structures
,
dp
2400
x3580
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4079
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
x732
309A
Morning run
binary search
,
math
,
two pointers
2000
x493
306D
Polygon
constructive algorithms
,
geometry
2300
x295
306C
White, Black and White Again
combinatorics
,
number theory
2100
x501
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x453
306A
Candies
implementation
800
x7170
305E
Playing with String
games
2300
x649
305D
Olya and Graph
combinatorics
,
math
2200
x516
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2479
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2161
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4874
304B
Calendar
brute force
,
implementation
1300
x3003
304A
Pythagorean Theorem II
brute force
,
math
1200
x10916
303E
Random Ranking
dp
,
math
,
probabilities
3000
x326
303D
Rotatable Number
math
,
number theory
2600
x302
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x897
303B
Rectangle Puzzle II
implementation
,
math
1700
x1348
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x8032
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x8350
302A
Eugeny and Array
implementation
800
x9187
301E
Yaroslav and Arrangements
dp
2800
x366
301D
Yaroslav and Divisors
data structures
2200
x2492
301C
Yaroslav and Algorithm
constructive algorithms
2500
x475
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2417
301A
Yaroslav and Sequence
constructive algorithms
1800
x3100
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1050
300D
Painting Square
dp
,
fft
2300
x760
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9859
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6428
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x23410
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5522
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x8300
298B
Sail
brute force
,
greedy
,
implementation
1200
x14439
298A
Snow Footprints
greedy
,
implementation
1300
x11050
297E
Mystic Carvings
data structures
3000
x378
297D
Color the Carpet
constructive algorithms
2500
x591
297C
Splitting the Uniqueness
constructive algorithms
2400
x970
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3553
297A
Parity Game
constructive algorithms
1700
x3668
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2332
296A
Yaroslav and Permutations
greedy
,
math
1100
x23671
295E
Yaroslav and Points
data structures
2500
x700
295D
Greg and Caves
combinatorics
,
dp
2400
x667
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1772
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x14749
295A
Greg and Array
data structures
,
implementation
1400
x18926
294E
Shaass the Great
dp
,
trees
2300
x979
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x364
294C
Shaass and Lights
combinatorics
,
number theory
1900
x3873
294B
Shaass and Bookshelf
dp
,
greedy
1700
x4599
294A
Shaass and Oskols
implementation
,
math
800
x24086
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