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Before contest
Codeforces Round 941 (Div. 1)
00:21:44
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
00:21:44
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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
1772A
A+B?
implementation
800
x43748
1873B
Good Kid
brute force
,
greedy
,
math
800
x43869
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43942
1742B
Increasing
greedy
,
implementation
,
sortings
800
x44114
1294A
Collecting Coins
math
800
x44157
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44179
1371A
Magical Sticks
math
800
x44186
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44309
379A
New Year Candles
implementation
1000
x44365
474B
Worms
binary search
,
implementation
1200
x44638
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44913
1703B
ICPC Balloons
data structures
,
implementation
800
x45077
456A
Laptops
sortings
1100
x45227
1426A
Floor Number
implementation
,
math
800
x45402
514A
Chewbaсca and Number
greedy
,
implementation
1200
x45405
1829A
Love Story
implementation
,
strings
800
x45561
1374B
Multiply by 2, divide by 6
math
900
x45663
1360B
Honest Coach
greedy
,
sortings
800
x45938
707A
Brain's Photos
implementation
800
x46056
1535A
Fair Playoff
brute force
,
implementation
800
x46149
1343A
Candies
brute force
,
math
900
x46183
1475B
New Year's Number
brute force
,
dp
,
math
900
x46259
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46308
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46354
1283A
Minutes Before the New Year
math
800
x46375
492A
Vanya and Cubes
implementation
800
x46545
1722A
Spell Check
implementation
800
x46579
1472B
Fair Division
dp
,
greedy
,
math
800
x47328
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x47430
279B
Books
binary search
,
brute force
,
implementation
,
two pointers
1400
x47523
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47751
1360A
Minimal Square
greedy
,
math
800
x47892
1551A
Polycarp and Coins
greedy
,
math
800
x48214
1619A
Square String?
implementation
,
strings
800
x48308
1873A
Short Sort
brute force
,
implementation
800
x48316
34B
Sale
greedy
,
sortings
900
x48419
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48570
363B
Fence
brute force
,
dp
1100
x48998
1915A
Odd One Out
bitmasks
,
implementation
800
x49084
1433A
Boring Apartments
implementation
,
math
800
x49132
80A
Panoramix's Prediction
brute force
800
x49312
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49463
1352C
K-th Not Divisible by n
binary search
,
math
1200
x49529
1624A
Plus One on the Subset
math
800
x49605
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50088
1367B
Even Array
greedy
,
math
800
x50094
1374A
Required Remainder
math
800
x50451
1850A
To My Critics
implementation
,
sortings
800
x50676
431A
Black Square
implementation
800
x51232
43A
Football
strings
1000
x51898
9A
Die Roll
math
,
probabilities
800
x52314
1760A
Medium Number
implementation
,
sortings
800
x53230
703A
Mishka and Game
implementation
800
x53392
313A
Ilya and Bank Account
implementation
,
number theory
900
x53422
1343B
Balanced Array
constructive algorithms
,
math
800
x53515
455A
Boredom
dp
1500
x54021
1791A
Codeforces Checking
implementation
,
strings
800
x54554
1367A
Short Substrings
implementation
,
strings
800
x54678
1475A
Odd Divisor
math
,
number theory
900
x54865
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55288
1807A
Plus or Minus
implementation
800
x55308
1560A
Dislike of Threes
implementation
800
x55664
579A
Raising Bacteria
bitmasks
1000
x55862
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56494
1669A
Division?
implementation
800
x56723
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56843
758A
Holiday Of Equality
implementation
,
math
800
x57050
1676A
Lucky?
implementation
800
x57663
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58094
32B
Borze
expression parsing
,
implementation
800
x58443
1692A
Marathon
implementation
800
x59348
466A
Cheap Travel
implementation
1200
x59352
1512A
Spy Detected!
brute force
,
implementation
800
x59684
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59992
630A
Again Twenty Five!
number theory
800
x61659
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62193
189A
Cut Ribbon
brute force
,
dp
1300
x62259
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62293
451A
Game With Sticks
implementation
900
x62458
1399A
Remove Smallest
greedy
,
sortings
800
x62505
1742A
Sum
implementation
800
x64165
151A
Soft Drinking
implementation
,
math
800
x65471
1154A
Restoring Three Numbers
math
800
x66154
339B
Xenia and Ringroad
implementation
1000
x66226
581A
Vasya the Hipster
implementation
,
math
800
x66903
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66997
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69622
155A
I_love_\%username\%
brute force
800
x70390
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70409
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70552
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70916
1352A
Sum of Round Numbers
implementation
,
math
800
x71517
427A
Police Recruits
implementation
800
x72179
230A
Dragons
greedy
,
sortings
1000
x74068
337A
Puzzles
greedy
900
x75334
510A
Fox And Snake
implementation
800
x76637
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76766
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77637
1335A
Candies and Two Sisters
math
800
x78371
268A
Games
brute force
800
x80638
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