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Codeforces Round (Div. 2)
5 days
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*combine tags by OR
greedy
implementation
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
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x47756
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9945
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22689
482A
Diverse Permutation
constructive algorithms
,
greedy
1200
x9588
478A
Initial Bet
implementation
1100
x25333
476A
Dreamoon and Stairs
implementation
,
math
1000
x42583
475A
Bayan Bus
implementation
1100
x4744
474B
Worms
binary search
,
implementation
1200
x46484
471A
MUH and Sticks
implementation
1100
x13386
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36935
466A
Cheap Travel
implementation
1200
x61645
465B
Inbox (100500)
implementation
1000
x10337
463B
Caisa and Pylons
brute force
,
implementation
,
math
1100
x26630
463A
Caisa and Sugar
brute force
,
implementation
1200
x9203
462A
Appleman and Easy Task
brute force
,
implementation
1000
x16736
461A
Appleman and Toastman
greedy
,
sortings
1200
x15392
459A
Pashmak and Garden
implementation
1200
x32119
454B
Little Pony and Sort by Shift
implementation
1200
x18031
452A
Eevee
brute force
,
implementation
,
strings
1000
x7943
450A
Jzzhu and Children
implementation
1000
x33679
447B
DZY Loves Strings
greedy
,
implementation
1000
x20170
445A
DZY Loves Chessboard
dfs and similar
,
implementation
1200
x29012
441A
Valera and Antique Items
implementation
1000
x18351
439B
Devu, the Dumb Guy
implementation
,
sortings
1200
x14177
435A
Queue on Bus Stop
implementation
1000
x10059
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x37899
433A
Kitahara Haruki's Gift
brute force
,
implementation
1100
x16065
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11595
431B
Shower Line
brute force
,
implementation
1200
x10648
427B
Prison Transfer
data structures
,
implementation
1100
x13831
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7428
420A
Start Up
implementation
1000
x6059
413A
Data Recovery
implementation
1200
x2573
412C
Pattern
implementation
,
strings
1200
x3905
408B
Garland
implementation
1200
x9119
404A
Valera and X
implementation
1000
x23511
402A
Nuts
greedy
,
math
1100
x4561
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4417
400B
Inna and New Matrix of Candies
brute force
,
implementation
,
schedules
1200
x7529
400A
Inna and Choose Options
implementation
1000
x6431
389B
Fox and Cross
greedy
,
implementation
1100
x6853
389A
Fox and Number Game
greedy
,
math
1000
x13958
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x12023
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9737
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16345
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x12091
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6666
379B
New Year Present
constructive algorithms
,
implementation
1200
x7231
379A
New Year Candles
implementation
1000
x45473
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6001
368A
Sereja and Coat Rack
implementation
1000
x7434
366B
Dima and To-do List
brute force
,
implementation
1200
x6783
366A
Dima and Guards
implementation
1100
x4503
365B
The Fibonacci Segment
implementation
1100
x14314
365A
Good Number
implementation
1100
x18020
362B
Petya and Staircases
implementation
,
sortings
1100
x13676
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8466
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6775
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4480
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9343
353A
Domino
implementation
,
math
1200
x18253
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25112
350A
TL
brute force
,
greedy
,
implementation
1200
x16189
349A
Cinema Line
greedy
,
implementation
1100
x29356
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9228
342A
Xenia and Divisors
greedy
,
implementation
1200
x12357
339B
Xenia and Ringroad
implementation
1000
x68246
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x9991
334A
Candy Bags
implementation
1000
x18302
327A
Flipping Game
brute force
,
dp
,
implementation
1200
x41000
322A
Ciel and Dancing
greedy
1000
x8130
316A1
Special Task
greedy
1100
x2620
315B
Sereja and Array
implementation
1200
x6937
313B
Ilya and Queries
dp
,
implementation
1100
x42762
312A
Whose sentence is it?
implementation
,
strings
1100
x4947
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7954
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x22390
298B
Sail
brute force
,
greedy
,
implementation
1200
x13855
296A
Yaroslav and Permutations
greedy
,
math
1100
x22608
292B
Network Topology
graphs
,
implementation
1200
x8014
292A
SMSC
implementation
1100
x2679
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x8986
287A
IQ Test
brute force
,
implementation
1100
x19308
285C
Building Permutation
greedy
,
implementation
,
sortings
1200
x22857
285B
Find Marble
implementation
1200
x14899
285A
Slightly Decreasing Permutations
greedy
,
implementation
1100
x13236
284B
Cows and Poker Game
brute force
,
implementation
1000
x6724
272A
Dima and Friends
implementation
,
math
1000
x24066
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x44481
268B
Buttons
implementation
,
math
1000
x31692
265B
Roadside Trees (Simplified Edition)
greedy
,
implementation
1000
x17087
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10685
262B
Roma and Changing Signs
greedy
1200
x11158
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x13835
258A
Little Elephant and Bits
greedy
,
math
1100
x22501
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6435
255B
Code Parsing
implementation
1200
x4915
253A
Boys and Girls
greedy
1100
x11087
252A
Little Xor
brute force
,
implementation
1100
x5226
250A
Paper Work
greedy
1000
x4040
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