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Codeforces Round 987 (Div. 2)
14:14:44
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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
584A
Olesya and Rodion
math
1000
x45594
583A
Asphalting Roads
implementation
1000
x11451
581A
Vasya the Hipster
implementation
,
math
800
x71862
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x88988
579A
Raising Bacteria
bitmasks
1000
x61927
577A
Multiplication Table
implementation
,
number theory
1000
x40149
572A
Arrays
sortings
900
x16648
567A
Lineland Mail
greedy
,
implementation
900
x32452
560A
Currency System in Geraldion
implementation
,
sortings
1000
x17213
556A
Case of the Zeros and Ones
greedy
900
x40270
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x13279
552A
Vanya and Table
implementation
,
math
1000
x9593
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16414
549A
Face Detection
implementation
,
strings
900
x9479
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x184636
545A
Toy Cars
implementation
900
x11612
540A
Combination Lock
implementation
800
x32799
535A
Tavas and Nafas
brute force
,
implementation
1000
x12218
520A
Pangram
implementation
,
strings
800
x98704
519A
A and B and Chess
implementation
900
x19047
515A
Drazil and Date
math
1000
x20382
513A
Game
constructive algorithms
,
math
800
x20454
510A
Fox And Snake
implementation
800
x84805
509A
Maximum in Table
brute force
,
implementation
800
x38613
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x18526
501A
Contest
implementation
900
x22846
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x53614
499B
Lecture
implementation
,
strings
1000
x39598
499A
Watching a movie
greedy
,
implementation
1000
x13977
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16453
492A
Vanya and Cubes
implementation
800
x51136
491A
Up the hill
constructive algorithms
,
implementation
1000
x2953
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x59915
486A
Calculating Function
implementation
,
math
800
x120425
479A
Expression
brute force
,
math
1000
x95093
476A
Dreamoon and Stairs
implementation
,
math
1000
x44284
474A
Keyboard
implementation
900
x46006
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x60593
469A
I Wanna Be the Guy
greedy
,
implementation
800
x98876
467A
George and Accommodation
implementation
800
x123876
465B
Inbox (100500)
implementation
1000
x10446
465A
inc ARG
implementation
900
x10065
462A
Appleman and Easy Task
brute force
,
implementation
1000
x16922
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x46370
454A
Little Pony and Crystal Mine
implementation
800
x14891
452A
Eevee
brute force
,
implementation
,
strings
1000
x8023
451A
Game With Sticks
implementation
900
x66197
450A
Jzzhu and Children
implementation
1000
x34999
448A
Rewards
implementation
800
x24397
447B
DZY Loves Strings
greedy
,
implementation
1000
x20326
447A
DZY Loves Hash
implementation
800
x9613
443A
Anton and Letters
constructive algorithms
,
implementation
800
x90735
441A
Valera and Antique Items
implementation
1000
x18535
440A
Forgotten Episode
implementation
800
x7441
439A
Devu, the Singer and Churu, the Joker
greedy
,
implementation
900
x25381
435A
Queue on Bus Stop
implementation
1000
x10189
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x60512
431A
Black Square
implementation
800
x55543
427A
Police Recruits
implementation
800
x79160
426A
Sereja and Mugs
implementation
800
x9251
424A
Squats
implementation
900
x8504
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x6102
420A
Start Up
implementation
1000
x6241
415A
Mashmokh and Lights
implementation
900
x9016
412B
Network Configuration
greedy
,
sortings
900
x5435
412A
Poster
greedy
,
implementation
900
x4467
411A
Password Check
*special problem
,
implementation
800
x7274
408A
Line to Cashier
implementation
900
x11280
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x102498
404A
Valera and X
implementation
1000
x24061
401A
Vanya and Cards
implementation
,
math
800
x16318
400A
Inna and Choose Options
implementation
1000
x6528
389A
Fox and Number Game
greedy
,
math
1000
x14089
387A
George and Sleep
implementation
900
x9703
386A
Second-Price Auction
implementation
800
x6439
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16515
384A
Coder
implementation
800
x16329
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x67144
379A
New Year Candles
implementation
1000
x46619
378A
Playing with Dice
brute force
800
x24103
376A
Lever
implementation
,
math
900
x9355
373A
Collecting Beats is Fun
implementation
900
x10721
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x6122
369A
Valera and Plates
greedy
,
implementation
900
x11069
368A
Sereja and Coat Rack
implementation
1000
x7520
363A
Soroban
implementation
800
x10794
361A
Levko and Table
constructive algorithms
,
implementation
800
x16753
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8564
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6855
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x25819
344A
Magnets
implementation
800
x122094
339B
Xenia and Ringroad
implementation
1000
x70343
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x217093
337A
Puzzles
greedy
900
x80612
336A
Vasily the Bear and Triangle
implementation
,
math
1000
x10117
334A
Candy Bags
implementation
1000
x18692
330A
Cakeminator
brute force
,
implementation
800
x28779
322A
Ciel and Dancing
greedy
1000
x8231
320A
Magic Numbers
brute force
,
greedy
900
x38901
318A
Even Odds
math
900
x115539
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