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Codeforces Round 987 (Div. 2)
07:33:13
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combine-tags-by-or
*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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Status
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Custom test
Problems
#
Name
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x26297
1490A
Dense Array
greedy
,
math
800
x31283
1488A
From Zero To Y
*special problem
,
math
900
x1431
1487A
Arena
implementation
,
sortings
800
x26595
1486A
Shifting Stacks
greedy
,
implementation
900
x25462
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x22833
1482A
Prison Break
math
800
x20488
1481A
Space Navigation
greedy
,
strings
800
x24989
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x17259
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25930
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26564
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x38065
1475B
New Year's Number
brute force
,
dp
,
math
900
x49482
1475A
Odd Divisor
math
,
number theory
900
x62151
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x29252
1474A
Puzzle From the Future
greedy
800
x22635
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x31702
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33982
1472B
Fair Division
dp
,
greedy
,
math
800
x51099
1472A
Cards for Friends
greedy
,
math
800
x42168
1471A
Strange Partition
greedy
,
math
,
number theory
900
x26618
1469B
Red and Blue
dp
,
greedy
1000
x27553
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x27596
1468N
Waste Sorting
greedy
,
implementation
900
x8253
1468E
Four Segments
greedy
800
x8867
1467A
Wizard of Orz
constructive algorithms
,
greedy
,
math
900
x24392
1466B
Last minute enhancements
dp
,
greedy
800
x22723
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22595
1462C
Unique Number
brute force
,
greedy
,
math
900
x32820
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x27333
1462A
Favorite Sequence
implementation
,
two pointers
800
x42224
1461A
String Generation
constructive algorithms
,
greedy
800
x18600
1459A
Red-Blue Shuffle
math
,
probabilities
800
x17034
1455A
Strange Functions
math
,
number theory
800
x26521
1454B
Unique Bid Auction
implementation
800
x28604
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x40799
1453A
Cancel the Trains
implementation
800
x22683
1452C
Two Brackets
greedy
800
x19682
1452A
Robot Program
math
800
x22184
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x19349
1451A
Subtract or Divide
greedy
,
math
800
x24321
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x15210
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x18011
1447B
Numbers Box
greedy
,
math
1000
x16952
1447A
Add Candies
constructive algorithms
,
math
800
x13841
1445B
Elimination
greedy
,
math
900
x15349
1445A
Array Rearrangment
greedy
,
sortings
800
x19133
1443A
Kids Seating
constructive algorithms
,
math
800
x16248
1440B
Sum of Medians
greedy
,
math
900
x19253
1440A
Buy the String
implementation
,
math
800
x19790
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x20039
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x19283
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x18034
1436B
Prime Square
constructive algorithms
,
math
900
x20679
1436A
Reorder
math
800
x22736
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x27095
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x28644
1433A
Boring Apartments
implementation
,
math
800
x53104
1431A
Selling Hamburgers
*special problem
800
x1908
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x24834
1430B
Barrels
greedy
,
implementation
,
sortings
800
x19424
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20942
1428A
Box is Pull
math
800
x16346
1427A
Avoiding Zero
math
,
sortings
900
x17264
1426B
Symmetric Matrix
implementation
900
x20702
1426A
Floor Number
implementation
,
math
800
x48542
1422A
Fence
geometry
,
math
800
x21015
1421A
XORwice
bitmasks
,
greedy
,
math
800
x29366
1420A
Cubes Sorting
math
,
sortings
900
x23523
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x24516
1419A
Digit Game
games
,
greedy
,
implementation
900
x19606
1418A
Buying Torches
math
1000
x23435
1417A
Copy-paste
greedy
,
math
800
x18298
1415A
Prison Break
brute force
,
math
800
x15206
1413A
Finding Sasuke
constructive algorithms
,
math
800
x14822
1411B
Fair Numbers
brute force
,
number theory
1000
x19769
1411A
In-game Chat
implementation
800
x20688
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x67209
1408A
Circle Coloring
constructive algorithms
800
x12512
1406A
Subset Mex
greedy
,
implementation
,
math
900
x21556
1405B
Array Cancellation
constructive algorithms
,
implementation
1000
x21666
1405A
Permutation Forgery
constructive algorithms
800
x21488
1401A
Distance and Axis
constructive algorithms
,
math
900
x27577
1400A
String Similarity
constructive algorithms
,
strings
800
x27076
1399B
Gifts Fixing
greedy
800
x43747
1399A
Remove Smallest
greedy
,
sortings
800
x67399
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24725
1398A
Bad Triangle
geometry
,
math
800
x27710
1397A
Juggling Letters
greedy
,
strings
800
x28720
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x24199
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20540
1392B
Omkar and Infinity Clock
implementation
,
math
800
x18502
1392A
Omkar and Password
greedy
,
math
800
x20788
1391B
Fix You
brute force
,
greedy
,
implementation
800
x27447
1391A
Suborrays
constructive algorithms
,
math
800
x24444
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x41870
1388B
Captain Flint and a Long Voyage
greedy
,
math
1000
x22328
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24980
1385B
Restore the Permutation by Merger
greedy
800
x37327
1385A
Three Pairwise Maximums
math
800
x39437
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