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Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
37:08:12
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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
4A
Watermelon
brute force
,
math
800
x478036
71A
Way Too Long Words
strings
800
x351059
231A
Team
brute force
,
greedy
800
x296969
282A
Bit++
implementation
800
x234143
158A
Next Round
*special problem
,
implementation
800
x231003
50A
Domino piling
greedy
,
math
800
x227231
263A
Beautiful Matrix
implementation
800
x222952
112A
Petya and Strings
implementation
,
strings
800
x207667
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x196759
281A
Word Capitalization
implementation
,
strings
800
x194684
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x191674
791A
Bear and Big Brother
implementation
800
x177312
266A
Stones on the Table
implementation
800
x176720
617A
Elephant
math
800
x168757
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166282
59A
Word
implementation
,
strings
800
x160739
977A
Wrong Subtraction
implementation
800
x153757
110A
Nearly Lucky Number
implementation
800
x141518
734A
Anton and Danik
implementation
,
strings
800
x138880
41A
Translation
implementation
,
strings
800
x133860
116A
Tram
implementation
800
x131244
677A
Vanya and Fence
implementation
800
x129532
271A
Beautiful Year
brute force
800
x126641
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126043
1030A
In Search of an Easy Problem
implementation
800
x118903
467A
George and Accommodation
implementation
800
x113027
344A
Magnets
implementation
800
x110906
486A
Calculating Function
implementation
,
math
800
x108605
136A
Presents
implementation
800
x108383
200B
Drinks
implementation
,
math
800
x107017
61A
Ultra-Fast Mathematician
implementation
800
x102976
228A
Is your horseshoe on the other hoof?
implementation
800
x101229
705A
Hulk
implementation
800
x98774
1328A
Divisibility Problem
math
800
x92593
469A
I Wanna Be the Guy
greedy
,
implementation
800
x90724
520A
Pangram
implementation
,
strings
800
x89012
144A
Arrival of the General
implementation
800
x88424
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86647
996A
Hit the Lottery
dp
,
greedy
800
x83608
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83354
785A
Anton and Polyhedrons
implementation
,
strings
800
x81578
268A
Games
brute force
800
x80383
1335A
Candies and Two Sisters
math
800
x78143
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77444
510A
Fox And Snake
implementation
800
x76074
427A
Police Recruits
implementation
800
x71899
1352A
Sum of Round Numbers
implementation
,
math
800
x71225
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70348
155A
I_love_\%username\%
brute force
800
x70212
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70136
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66731
581A
Vasya the Hipster
implementation
,
math
800
x66731
1154A
Restoring Three Numbers
math
800
x65911
151A
Soft Drinking
implementation
,
math
800
x65200
1742A
Sum
implementation
800
x63819
1399A
Remove Smallest
greedy
,
sortings
800
x62343
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62136
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x61803
630A
Again Twenty Five!
number theory
800
x61355
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59688
1512A
Spy Detected!
brute force
,
implementation
800
x59455
1692A
Marathon
implementation
800
x59106
32B
Borze
expression parsing
,
implementation
800
x58257
1676A
Lucky?
implementation
800
x57403
758A
Holiday Of Equality
implementation
,
math
800
x56882
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56716
1669A
Division?
implementation
800
x56420
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56343
1560A
Dislike of Threes
implementation
800
x55502
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55104
1807A
Plus or Minus
implementation
800
x55010
1367A
Short Substrings
implementation
,
strings
800
x54568
1791A
Codeforces Checking
implementation
,
strings
800
x54247
1343B
Balanced Array
constructive algorithms
,
math
800
x53398
703A
Mishka and Game
implementation
800
x53271
1760A
Medium Number
implementation
,
sortings
800
x52993
9A
Die Roll
math
,
probabilities
800
x52136
431A
Black Square
implementation
800
x51037
1850A
To My Critics
implementation
,
sortings
800
x50341
1374A
Required Remainder
math
800
x50340
1367B
Even Array
greedy
,
math
800
x49963
1624A
Plus One on the Subset
math
800
x49487
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49367
80A
Panoramix's Prediction
brute force
800
x49130
1433A
Boring Apartments
implementation
,
math
800
x49011
1915A
Odd One Out
bitmasks
,
implementation
800
x48757
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48461
1551A
Polycarp and Coins
greedy
,
math
800
x48092
1873A
Short Sort
brute force
,
implementation
800
x48026
1619A
Square String?
implementation
,
strings
800
x47927
1360A
Minimal Square
greedy
,
math
800
x47793
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47343
1472B
Fair Division
dp
,
greedy
,
math
800
x47205
492A
Vanya and Cubes
implementation
800
x46396
1722A
Spell Check
implementation
800
x46395
1283A
Minutes Before the New Year
math
800
x46246
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46220
1535A
Fair Playoff
brute force
,
implementation
800
x46031
707A
Brain's Photos
implementation
800
x45900
1360B
Honest Coach
greedy
,
sortings
800
x45831
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