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Before contest
Codeforces Round 941 (Div. 1)
13:51:09
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Before contest
Codeforces Round 941 (Div. 2)
13:51:09
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math
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2-sat
binary search
bitmasks
brute force
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constructive algorithms
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dfs and similar
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expression parsing
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geometry
graph matchings
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greedy
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Problems
#
Name
4A
Watermelon
brute force
,
math
800
x479499
1A
Theatre Square
math
1000
x245015
50A
Domino piling
greedy
,
math
800
x227869
617A
Elephant
math
800
x169358
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166865
69A
Young Physicist
implementation
,
math
1000
x154504
486A
Calculating Function
implementation
,
math
800
x108912
200B
Drinks
implementation
,
math
800
x107315
318A
Even Odds
math
900
x105772
1328A
Divisibility Problem
math
800
x92884
479A
Expression
brute force
,
math
1000
x88324
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86827
1335A
Candies and Two Sisters
math
800
x78360
1352A
Sum of Round Numbers
implementation
,
math
800
x71503
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70896
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70542
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70392
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69604
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x66987
581A
Vasya the Hipster
implementation
,
math
800
x66897
1154A
Restoring Three Numbers
math
800
x66146
151A
Soft Drinking
implementation
,
math
800
x65452
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62281
758A
Holiday Of Equality
implementation
,
math
800
x57036
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56835
1475A
Odd Divisor
math
,
number theory
900
x54852
1343B
Balanced Array
constructive algorithms
,
math
800
x53507
9A
Die Roll
math
,
probabilities
800
x52305
1374A
Required Remainder
math
800
x50442
1367B
Even Array
greedy
,
math
800
x50092
1624A
Plus One on the Subset
math
800
x49600
1352C
K-th Not Divisible by n
binary search
,
math
1200
x49505
1433A
Boring Apartments
implementation
,
math
800
x49127
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x48566
1551A
Polycarp and Coins
greedy
,
math
800
x48209
1360A
Minimal Square
greedy
,
math
800
x47885
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47744
1472B
Fair Division
dp
,
greedy
,
math
800
x47316
1283A
Minutes Before the New Year
math
800
x46366
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x46304
1475B
New Year's Number
brute force
,
dp
,
math
900
x46253
1343A
Candies
brute force
,
math
900
x46177
1374B
Multiply by 2, divide by 6
math
900
x45647
1426A
Floor Number
implementation
,
math
800
x45397
1676B
Equal Candies
greedy
,
math
,
sortings
800
x44901
1371A
Magical Sticks
math
800
x44179
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44174
1294A
Collecting Coins
math
800
x44148
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43930
1873B
Good Kid
brute force
,
greedy
,
math
800
x43859
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43331
1857A
Array Coloring
greedy
,
math
800
x43129
584A
Olesya and Rodion
math
1000
x42704
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x42689
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42397
1542A
Odd Set
math
800
x42104
476A
Dreamoon and Stairs
implementation
,
math
1000
x40994
1472A
Cards for Friends
greedy
,
math
800
x40763
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x40611
233A
Perfect Permutation
implementation
,
math
800
x40301
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x39719
1921A
Square
greedy
,
math
800
x39639
1296A
Array with Odd Sum
math
800
x39349
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x38897
1729A
Two Elevators
math
800
x38770
1941A
Rudolf and the Ticket
brute force
,
math
800
x38394
1348A
Phoenix and Balance
greedy
,
math
800
x38303
1342A
Road To Zero
greedy
,
math
1000
x38237
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38227
1358A
Park Lighting
greedy
,
math
800
x38026
1579A
Casimir's String Solitaire
math
,
strings
800
x37730
1385A
Three Pairwise Maximums
math
800
x37496
1899A
Game with Integers
games
,
math
,
number theory
800
x37287
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37125
1327A
Sum of Odd Integers
math
1100
x36772
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36674
124A
The number of positions
math
1000
x36207
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x35928
1537A
Arithmetic Array
greedy
,
math
800
x35880
1369A
FashionabLee
geometry
,
math
800
x35522
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35520
1593A
Elections
math
800
x35451
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35226
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35175
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x35164
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35052
1660A
Vasya and Coins
greedy
,
math
800
x34948
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x34901
1873C
Target Practice
implementation
,
math
800
x34870
1560B
Who's Opposite?
math
800
x34636
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34272
1353C
Board Moves
math
1000
x34122
1624B
Make AP
implementation
,
math
900
x34088
1955A
Yogurt Sale
math
800
x33981
1858A
Buttons
games
,
greedy
,
math
800
x33952
1950C
Clock Conversion
implementation
,
math
800
x33670
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33003
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32805
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x32735
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32166
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