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Before contest
Codeforces Round #794 (Div. 1)
06:47:25
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Before contest
Codeforces Round #794 (Div. 2)
06:47:24
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math
combine-tags-by-or
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2-sat
binary search
bitmasks
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combinatorics
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data structures
dfs and similar
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dp
dsu
expression parsing
fft
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games
geometry
graph matchings
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greedy
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Problems
#
Name
4A
Watermelon
brute force
,
math
800
x301232
1A
Theatre Square
math
1000
x172134
50A
Domino piling
greedy
,
math
800
x143626
69A
Young Physicist
implementation
,
math
1000
x102145
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x101691
617A
Elephant
math
800
x98698
318A
Even Odds
math
900
x68415
486A
Calculating Function
implementation
,
math
800
x67965
200B
Drinks
implementation
,
math
800
x67369
479A
Expression
brute force
,
math
1000
x60853
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x59197
1328A
Divisibility Problem
math
800
x57361
1335A
Candies and Two Sisters
math
800
x51542
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x50144
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x46627
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x46023
581A
Vasya the Hipster
implementation
,
math
800
x45226
1352A
Sum of Round Numbers
implementation
,
math
800
x44055
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x43811
1154A
Restoring Three Numbers
math
800
x43445
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x43407
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x41745
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x41262
1343B
Balanced Array
constructive algorithms
,
math
800
x39506
758A
Holiday Of Equality
implementation
,
math
800
x38318
151A
Soft Drinking
implementation
,
math
800
x37223
1374A
Required Remainder
math
800
x36581
1367B
Even Array
greedy
,
math
800
x36401
1360A
Minimal Square
greedy
,
math
800
x36061
1343A
Candies
brute force
,
math
900
x36018
1475A
Odd Divisor
math
,
number theory
900
x35319
1433A
Boring Apartments
implementation
,
math
800
x35086
1624A
Plus One on the Subset
math
800
x35072
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x34537
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x34526
749A
Bachgold Problem
greedy
,
implementation
,
math
,
number theory
800
x34002
1472B
Fair Division
dp
,
greedy
,
math
800
x33719
1551A
Polycarp and Coins
greedy
,
math
800
x33525
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x33378
1374B
Multiply by 2, divide by 6
math
900
x33369
1371A
Magical Sticks
math
800
x33190
1475B
New Year's Number
brute force
,
dp
,
math
900
x32741
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x32615
1348A
Phoenix and Balance
greedy
,
math
800
x32465
9A
Die Roll
math
,
probabilities
800
x32106
1472A
Cards for Friends
greedy
,
math
800
x32097
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x31885
1294A
Collecting Coins
math
800
x31580
1283A
Minutes Before the New Year
math
800
x31560
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x31466
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x31312
1352C
K-th Not Divisible by n
binary search
,
math
1200
x31174
1358A
Park Lighting
greedy
,
math
800
x30823
1385A
Three Pairwise Maximums
math
800
x30554
584A
Olesya and Rodion
math
1000
x30543
1426A
Floor Number
implementation
,
math
800
x30542
1369A
FashionabLee
geometry
,
math
800
x30201
1296A
Array with Odd Sum
math
800
x30134
1579A
Casimir's String Solitaire
math
,
strings
800
x29874
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x29758
1342A
Road To Zero
greedy
,
math
1000
x29217
1542A
Odd Set
math
800
x29215
476A
Dreamoon and Stairs
implementation
,
math
1000
x28948
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x28577
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x28098
1560B
Who's Opposite?
math
800
x28096
1353C
Board Moves
math
1000
x27842
233A
Perfect Permutation
implementation
,
math
800
x27751
1327A
Sum of Odd Integers
math
1100
x27459
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x27282
1537A
Arithmetic Array
greedy
,
math
800
x27158
1593A
Elections
math
800
x27058
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x27048
742A
Arpa’s hard exam and Mehrdad’s naive cheat
implementation
,
math
,
number theory
1000
x26933
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x26928
1660A
Vasya and Coins
greedy
,
math
800
x26855
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x26801
1538B
Friends and Candies
greedy
,
math
800
x26435
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x26243
1506A
Strange Table
math
800
x26056
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x25990
1490A
Dense Array
greedy
,
math
800
x25926
124A
The number of positions
math
1000
x25773
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x25652
1547A
Shortest Path with Obstacle
implementation
,
math
800
x25296
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x25280
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x25229
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x25198
1520D
Same Differences
data structures
,
hashing
,
math
1200
x25185
82A
Double Cola
implementation
,
math
1100
x24988
1624B
Make AP
implementation
,
math
900
x24948
1549A
Gregor and Cryptography
math
,
number theory
800
x24827
1676B
Equal Candies
greedy
,
math
,
sortings
800
x24497
1341A
Nastya and Rice
math
900
x24401
1611A
Make Even
constructive algorithms
,
math
800
x24203
1519A
Red and Blue Beans
math
800
x24191
1398A
Bad Triangle
geometry
,
math
800
x24185
1622A
Construct a Rectangle
geometry
,
math
800
x24111
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x24106
1296B
Food Buying
math
900
x24057
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