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Codeforces Round 946 (Div. 3)
3 days
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Difficulty:
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brute force
combine-tags-by-or
*combine tags by OR
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
1904A
Forked!
brute force
,
implementation
900
x16009
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16123
670A
Holidays
brute force
,
constructive algorithms
,
greedy
,
math
900
x16444
1351B
Square?
brute force
,
implementation
,
math
900
x16461
1808A
Lucky Numbers
brute force
,
implementation
900
x17360
6A
Triangle
brute force
,
geometry
900
x19104
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20056
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x20291
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20430
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20476
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21199
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21578
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x21931
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x21987
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x22404
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x22465
1380A
Three Indices
brute force
,
data structures
900
x23386
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x23927
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25175
1555A
PizzaForces
brute force
,
math
900
x27330
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29657
1339A
Filling Diamonds
brute force
,
dp
,
implementation
,
math
900
x31141
1462C
Unique Number
brute force
,
greedy
,
math
900
x31340
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32585
320A
Magic Numbers
brute force
,
greedy
900
x33782
460A
Vasya and Socks
brute force
,
implementation
,
math
900
x44362
1343A
Candies
brute force
,
math
900
x46383
1475B
New Year's Number
brute force
,
dp
,
math
900
x46571
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x84184
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x5901
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6718
794A
Bank Robbery
brute force
,
implementation
800
x6923
1250F
Data Center
brute force
,
implementation
800
x7152
157A
Game Outcome
brute force
800
x7419
46A
Ball Game
brute force
,
implementation
800
x8391
747A
Display Size
brute force
,
math
800
x10045
888A
Local Extrema
brute force
,
implementation
800
x10672
931A
Friends Meeting
brute force
,
greedy
,
implementation
,
math
800
x11703
811A
Vladik and Courtesy
brute force
,
implementation
800
x11767
32A
Reconnaissance
brute force
800
x12025
1534A
Colour the Flag
brute force
,
implementation
800
x12591
796A
Buying A House
brute force
,
implementation
800
x12844
629A
Far Relative’s Birthday Cake
brute force
,
combinatorics
,
constructive algorithms
,
implementation
800
x13130
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13407
1060A
Phone Numbers
brute force
800
x13726
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13792
47A
Triangular numbers
brute force
,
math
800
x14346
908A
New Year and Counting Cards
brute force
,
implementation
800
x14618
1271A
Suits
brute force
,
greedy
,
math
800
x14689
1415A
Prison Break
brute force
,
math
800
x14929
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15108
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15805
1236A
Stones
brute force
,
greedy
,
math
800
x15820
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15907
919A
Supermarket
brute force
,
greedy
,
implementation
800
x15917
1750B
Maximum Substring
brute force
,
greedy
,
implementation
800
x15964
551A
GukiZ and Contest
brute force
,
implementation
,
sortings
800
x16033
764A
Taymyr is calling you
brute force
,
implementation
,
math
800
x16052
1689A
Lex String
brute force
,
greedy
,
implementation
,
sortings
,
two pointers
800
x16390
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x16447
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16456
1884A
Simple Design
brute force
,
greedy
,
math
800
x16493
918A
Eleven
brute force
,
implementation
800
x16771
1761A
Two Permutations
brute force
,
constructive algorithms
800
x17031
1789A
Serval and Mocha's Array
brute force
,
math
,
number theory
800
x17111
1091A
New Year and the Christmas Ornament
brute force
,
implementation
,
math
800
x17339
1612A
Distance
brute force
,
constructive algorithms
800
x17496
755A
PolandBall and Hypothesis
brute force
,
graphs
,
math
,
number theory
800
x17543
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x17780
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17825
1191A
Tokitsukaze and Enhancement
brute force
800
x17858
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18043
1546A
AquaMoon and Two Arrays
brute force
,
greedy
800
x18090
1114A
Got Any Grapes?
brute force
,
greedy
,
implementation
800
x18249
1654A
Maximum Cake Tastiness
brute force
,
greedy
,
implementation
,
sortings
800
x18421
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18577
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x18795
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19125
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19330
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19382
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x19896
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20048
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20051
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x20179
1810A
Beautiful Sequence
brute force
,
greedy
800
x20364
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20465
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20775
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20777
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x20848
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20879
1269A
Equation
brute force
,
math
800
x20916
22A
Second Order Statistics
brute force
800
x20949
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21005
1680A
Minimums and Maximums
brute force
,
math
800
x21034
1805A
We Need the Zero
bitmasks
,
brute force
800
x21169
1228A
Distinct Digits
brute force
,
implementation
800
x21253
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21373
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21721
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x21927
1637A
Sorting Parts
brute force
,
sortings
800
x22091
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