task stringlengths 0 154k | __index_level_0__ int64 0 39.2k |
|---|---|
Aspen Avenue
Description:
## Input
The input file starts with a positive even integer
$N$ between $4$ and $2\, 000$ (inclusive), giving the
total number of trees in the avenue. The next line contains two
integers $L$ and
$W$, where $1 \le L \le 10\, 000$ is the length
of the road, in meters, and $... | 26,300 |
Assassins
Description:
Assassins generally lay careful plans before executing them,
including planning multiple attempts to dispose of the same
target, with the second attempt being a backup in case the
first attempt fails, the third attempt being a secondary
backup, and so on. Using their great annihi... | 26,301 |
Assembly Line
Description:
The last worker in a production line at the factory of
Automated Composed Machinery is worried. She knows that her job
hangs in the balance unless her productivity increases. Her
work consists of assembling a set of pieces in a given
sequence, but the time spent on assembling... | 26,302 |
Assigning Workstations
Description:
Penelope is very lazy and hates unlocking machines for the
arriving researchers. She can unlock the machines remotely from
her desk, but does not feel that this menial task matches her
qualifications. Should she decide to ignore the security
guidelines she could simp... | 26,303 |
Assistant Ranking
Description:
The online retailer Amagoogsoftbook currently offers
$N$ different so-called
“home assistants”, which it wants to recommend to its
customers. For this recommendation, they wish to rank all the
assistants. The quality of this ranking is not very important –
multiple as... | 26,304 |
Association for Computing Machinery
Description:
ACM (Association for Computing Machinery) organizes the
International Collegiate Programming Contest (ICPC) worldwide
every year.
In the ICPC, a team of three students is presented with a
problem set that contains $N$ problems1 of
varying types and diff... | 26,305 |
Association for Control Over Minds
Description:
You are the boss of ACM
(Association for Control over Minds), an upstanding company
with a single goal of world domination.
Yesterday, you woke up, and saw that the weather was clear,
and the birds were singing. “Another day, another world
domination pla... | 26,306 |
Association for Convex Main Office
Description:
You are the boss of ACM
(Association for Convex Main Office), an upstanding company
with a single goal of world domination.
Today, you have decided to move your main office from
Helsinki to Singapore. You have purchased a square-shaped land
in Singapore,... | 26,307 |
Association for Cool Machineries (Part 1)
Description:
You are the boss of ACM
(Association for Cool Machineries), an upstanding company with
a single goal of world domination.
Like all other world domination oriented villains, you dream
of having a gigantic evil robot doing evil deeds. I mean, is
the... | 26,308 |
Association for Cool Machineries (Part 2)
Description:
In order to understand this problem, you need to read
the “Association for Cool Machineries (Part 1)”
problem.
You are the boss of ACM
(Association for Cool Machineries), an upstanding company with
a single goal of world domination.
Today, after ... | 26,309 |
Association for the Country of Mububa
Description:
You are the boss of ACM
(Association for the Country of Mububa), an upstanding company
with a single goal of world domination.
Today, you have conquered the unnamed country of Mububa (how
an unnamed country has a name is, of course, outside the scope
... | 26,310 |
Association of Camera Makers
Description:
ACM (Association of Camera
Makers) is a company that produces amazing surveillance
cameras. Each camera can produce a live panoramic video feed,
giving you a 360-degree view of the surroundings. However, they
also have a certain visual range $R$, beyond which t... | 26,311 |
Association of Cats and Magical Lights
Description:
Rar the Cat$^($™$^)$ is the founder of ACM (Association of Cats and Magical Lights).
This is the story of the founding of ACM.
It is the second half of the year again and Rar the
Cat$^($™$^)$ is looking forward to Christmas.
When people think of Christma... | 26,312 |
Association of Computer Maintenance
Description:
In order to keep up with the rapid technological
advancements, Mr. Panda needs to backup all the data on his
computer to allow him to do a full upgrade of his computer.
Since the upgrade will take some time, he will peruse the
services of the company ACM... | 26,313 |
Association of Myths
Description:
Arnar is playing his favourite video game Association of
Myths. He’s playing a character by the name of
Lumen. Lumen has a special ability where she
can shoot a laser beam across the entire map killing all
enemies it hits. The only drawback is that the beam is rather
... | 26,314 |
Associative Exponents
Description:
The Association for Curtailing Parentheses in Computations
is having some trouble. Some members learned in class that
$a^{b^ c} = a^{(b^ c)}$,
but others insist that ${a^ b}^ c
= {(a^ b)}^ c$. You are trying to keep the peace by
assuring them that it works either ... | 26,315 |
Asteroid Avoidance
Description:
The legendary starship of Flatland, Rectalateral, needs to
escape from a star which is about to go supernova by
teleporting away. Unfortunately, the possible teleport
destinations are in the middle of an asteroid field. Luckily,
you have a map of the asteroid field with ... | 26,316 |
Asteroid Mining
Description:
Shofa is working on her new spacefaring game, No
Person’s Star. The star systems in the game are
procedurally generated, and contain stars, planets and
asteroids. The asteroids are only used to mine minerals, and
consist of multiple mineral veins. Players can only mine one
... | 26,317 |
Asteroid Rangers
Description:
The year is 2112 and humankind has conquered the solar
system. The Space Ranger Corps have set up bases on any hunk of
rock that is even remotely inhabitable. Your job as a member of
the Asteroid Communications Ministry is to make sure that all
of the Space Ranger asteroid... | 26,318 |
Asteroids
Description:
The year is 2115. The asteroid communication relay system
was set up a decade ago by the Asteroid Communication Ministry.
It is running fine except for one small problem – there are too
many asteroids! The smaller ones not only keep interfering with
the signals from the relay sta... | 26,319 |
Astro
Description:
Ivica and Marica are attending astronomy classes and are
observing two unusual stars. They noted the time when each of
them flashed. They further noticed that each of the stars
flashes periodically, at regular intervals, and now they are
wondering: on what day, at what hour will the ... | 26,320 |
Astrological Sign
Description:
Harry Potter and his friends are now fourth-year students at
Hogwarts School of Witchcraft and Wizardry. This year, one of
their subjects is Astrology. To become a
successful wizard, Astrology is crucial, as it allows one to
predict future events or gain insights into peo... | 26,321 |
Astronomer
Description:
The astronomer has a passion for stargazing. In particular,
he gets immense pleasure out of gazing at $k$ stars simultaneously through
his telescope. Building a telescope with
radius $r$ costs
$t\cdot r$ kroner. A
newly built telescope will point exactly at the origin
$(... | 26,322 |
Atlantis
Description:
You may have heard of the lost city of Atlantis. As legend
goes, Atlantis was a city of great wealth and power. Then the
Gods became displeased with Atlantis and sank it into the
ocean. What you may not have heard is the story of Demetrios,
the only person in Atlantis with a ship ... | 26,323 |
Atlögur
Description:
Guðmundur is a Ph.D. student at an Icelandic university,
where he studies history. He has a burning interest in duels
and the ways of knights of past times. In the middle ages, and
the ages before them, battles between knights were common. His
research revolves around these knights... | 26,324 |
Atomic Energy
Description:
Although an atom is composed of various parts, for the
purposes of this method only the number of neutrons in the atom
is relevant1. In the method, a laser charge is
fired at the atom, which then releases energy in a process
formally called explodification. Exactly
how th... | 26,325 |
Attendance
Description:
It is the first day of school at Liking University, or “Lku”
for short. Lku administration is very strict with attendance,
especially on the first day. In order to verify everyone’s
attendance, the Lku’s principal has made an attendance list. He
then asked to all students to sta... | 26,326 |
Attendance
Description:
Taking attendance in your class is a tedious task. You call
out the names of students one at a time in alphabetical order.
If the student is present, they respond by saying “Present!” before you call the next name.
This is such a boring task that you sometimes zone out and
don’t ke... | 26,327 |
Austan Atlantshafs
Description:
Many cities and other institutions have a tendency to raise
statues of various kinds to garner attention. In this context
larger statues are of course preferable, as a larger statue
garners more attention. It is even better when the statue is
the largest in a large area ... | 26,328 |
Auto Completion
Description:
The auto completion algorithm works based on a pre-defined
dictionary of $n$ words.
Suppose the search box contains the text $w$. When the user presses the tab key
$i$ times in a row, the
algorithm finds the $i$-th
lexicographically smallest word from the dictionary tha... | 26,329 |
Auto-Coin-o-Matic
Description:
It’s finally here! The day you unveil your new invention,
the Auto-Coin-o-Matic! You watch with glee and anxiety as
people insert their card into the machine, type in the amount
they want, and get exact change out with the fewest number of
coins.
But was it actually the ... | 26,330 |
Automatic Trading
Description:
A brokerage firm is interested in detecting automatic
trading. They believe that a particular algorithm repeats
itself; that is, it makes the same sequence of trades at a
later time. The firm has identified a set of 26 key stocks that
they believe are likely to be traded ... | 26,331 |
Autori
Description:
Great scientific discoveries are often named by the last
names of scientists that made them. For example, the most
popular asymmetric cryptography system, RSA was discovered by
Rivest, Shamir and Adleman. Another notable example is the
Knuth-Morris-Pratt algorithm, named by Knuth, M... | 26,332 |
Av(1324)
Description:
Five problems ready, and already Arnar and Atli are running
out of ideas. In desperation they start asking other members of
the faculty at RU what problems they should pose for their
students, and after a bit of searching they end up talking to
Henning. He says that “Pattern avoid... | 26,333 |
Avalanche
Description:
After Joshua saw through Alexander’s attempts to fake
pictures of snowflakes1, Alexander has
become vengeful and obsessed with snow. He has come up with an
evil master plan which could be the end of Joshua, where the
first step is to invite him on a skiing trip.
Together, they a... | 26,334 |
Average Character
Description:
Have you ever wondered what the average ASCII character of
any given string is? No? Never? Really? Well, is it a character
in the string or something else?
Would you do this calculation by hand with an ASCII table?
Probably not! All modern programming languages include
f... | 26,335 |
Average Rank
Description:
The National Weekly Escape Room Challenge (NWERC) is a
long-running competition held in Eindhoven. Every week a new
escape room is presented, and anyone who completes it in their
first attempt gains one point.
At the end of each week, competitors are ranked by the total
numbe... | 26,336 |
Average Spanning Tree
Description:
Victor works at a company dealing with trees. Unlike most
such companies, the one Victor works at does not cut them down.
Instead, they create new trees from graphs. For example, some
customers might give them a graph and ask for the minimum
spanning tree, while other... | 26,337 |
Average Speed
Description:
You have bought a car in order to drive from Waterloo to a
big city. The odometer on their car is broken, so you cannot
measure distance. But the speedometer and cruise control both
work, so the car can maintain a constant speed which can be
adjusted from time to time in resp... | 26,338 |
Average Substring Value
Description:
Let $s$ be a nonempty
string consisting entirely of $\textrm{base-}10$ digits (0–9). If the length
of $s$ is $n,$ number the digits $1, 2, 3, \ldots , n$ from left to
right, and for $1 \leq i \leq j
\leq n,$ let $s[i,j]$ denote the substring
consisting of the di... | 26,339 |
Avion
Description:
Mirko and Slavko are USKOK agents tracking the movements of
an unnamed corrupt government official. Anonymous sources have
tipped them about his upcoming escape attempt. They now know he
plans to use his diplomatic liaisons to try and hitch a ride on
a CIA blimp leaving from Severin ... | 26,340 |
Avogadro
Description:
Luka is slacking again during chemistry class, while the
teacher is explaining Avogadro’s law.
Luka first drew a table consisting of $3$ rows and $N$ columns. Then he wrote the numbers
$1$ to $N$ into the first row in arbitrary
order, each number appearing exactly once. In the other ... | 26,341 |
Avoiding Airports
Description:
David is currently at the airport in country $1$, and the current time is
$0$, and he would like to
travel country $n$. He
does not care about the total amount of time needed to travel,
but he really hates waiting in the airport. If he waits
$t$ seconds in an airport,... | 26,342 |
Avoiding Asteroids
Description:
You escaped the planet, but enemy starfighters are right
behind you! To make things worse, in between you and the safety
of your base is an asteroid field. The starfighters would never
follow you into the asteroids, but unfortunately you used all
your fuel in the escape,... | 26,343 |
Avoiding the Abyss
Description:
You are standing on a point with integer coordinates
$(x_s, y_s)$. You want to
walk to the point with integer coordinates $(x_t, y_t)$. To do this, you can walk
along a sequence of line segments. But there is a swimming pool
in your way. The swimming pool is an axis alig... | 26,344 |
Avoiding the Apocalypse
Description:
You and the rest of your team are stuck in a town during the
zombie apocalypse of 2020. You all might be infected with the
virus and hence you will have to find your way to one of the
medical facilities to get a cure before you also become
zombies. Because you are s... | 26,345 |
Avoidland
Description:
Avoidland is a puzzle played on an $n \times n$ board with $n$ pawns. The pawns are initially
placed on the squares of the board, at most one pawn per
square. The goal is to move the pawns so that they “avoid” each
other—there cannot be a row or a column with more than one
pawn. ... | 26,346 |
Awkward Party
Description:
Martin has invited everyone he knows to celebrate his 535th
birthday, and a whopping $n$ people from all over the world
have accepted the invitation.
When deciding the seating arrangement, Martin’s mother
Margarethe have decided that all the guests should be seated
with maxi... | 26,347 |
Aww Man
Description:
You need a total of $T$
different rare materials that can only be found in the deepest
caves of the rarest biome at very specific times of the year.
The materials are very important to you, so you want to make
sure that nothing bad happens. Thus, you want to make a
plan.
For e... | 26,348 |
Azulejos
Description:
Your task is to find an ordering of the tiles in each row
that satisfies these constraints, or determine that no such
ordering exists.
## Input
The first line of input contains an integer $n$ ($1
\leq n \leq 5\cdot 10^5$), the number of tiles in each
row. The next four lines con... | 26,349 |
B Road Band
Description:
All the residents of the rural community of Axes Point live
on one of two parallel streets separated by a band of green
park land. Recently, the local board of supervisors received a
grant to (finally) bring wireless service to the town. The
grant provides enough money for them... | 26,350 |
BAAS
Description:
BAAS Inc. (Build Airplanes As-a-Service) has grand plans to
build lots of airplanes. Naturally, the airplane construction
process consists of multiple steps, each of which may take some
time. Some steps can take more time to complete than others,
e.g. attaching a plane wing may take l... | 26,351 |
BASIC Interpreter
Description:
The BASIC computer programming language has been popular for
many years, and there have been dozens of ‘dialects’ of the
language. It’s considered a high-level language and is
typically interpreted (rather than compiled). For this problem,
write an interpreter for a restr... | 26,352 |
Babelfish
Description:
You have just moved from Waterloo to a big city. The people
here speak an incomprehensible dialect of a foreign language.
Fortunately, you have a dictionary to help you understand
them.
## Input
Input consists of up to $100\,
000$ dictionary entries, followed by a blank line,
... | 26,353 |
Baby Bites
Description:
Unfortunately, talking while having a mouthful sometimes
causes Arild to mumble incomprehensibly, making it hard to know
how far he has counted. Sometimes you even suspect he loses his
count! You decide to write a program to determine whether
Arild’s counting makes sense or not.... | 26,354 |
Baby Names
Description:
Kattis is having a baby! O.o. However, she does not know
what to name her baby. Thankfully, her friends have many ideas,
giving suggestions for both genders.
Given $\textbf{N}$
distinct baby name suggestions (each babyName string consists of only UPPERCASE
alphabet characters o... | 26,355 |
Baby Panda
Description:
Alex is taking care of a baby panda who seems to be
unusually sniffly. Every day, the baby panda may sneeze out
zero or one slime(s) into its enclosure; every night, all
slimes present in the enclosure split, so that the number of
slimes doubles overnight. Alex places the baby p... | 26,356 |
Babylonian Numbers
Description:
More than $4\, 000$
years ago, the ancient Babylonians used a numerical system that
is well known for being the first positional numerical system.
In such a system, a non-negative integer is represented by a
sequence of digits such that the value of a digit depends both
... | 26,357 |
Bachelor's Thesis
Description:
For SoCCat’s Final Year Project, SoCCat will write a thesis
studying the behaviour of a particular operation: the
cat-split.
Initially, suppose SoCCat has an array of $n$ integers $a_1, a_2, \ldots , a_ n$, and an
integer $k$ ($1 \leq k \leq n$). In one
cat-split operati... | 26,358 |
Bachet's Game
Description:
## Input
The input consists of a number of lines (between
$1$ and $100$, inclusive). Each line describes
one game by a sequence of positive numbers. The first number is
$n \leq 1\, 000\, 000$ the
number of stones on the table; the second number is
$m \leq 10$ giving the
... | 26,359 |
Backpack Buddies
Description:
The prudent Mr. Day and adventurous Dr. Knight have decided
to be backpack buddies and go trekking in the gorgeous
Norwegian mountains. Of course they will use the trails marked
by the Norwegian Trekking Association (DNT), like any sane
trekkers would; such trails all star... | 26,360 |
Backspace
Description:
Right before Forritunarkeppni Framhaldsskólanna started,
Bjarki decided to update his computer. He didn’t notice
anything off until he started writing code in his favourite
editor Bim (Bjarki IMproved). Usually when he uses this editor
and presses backspace one letter to the left... | 26,361 |
Bacon, Eggs, and Spam
Description:
You are a short-order cook in a local diner. Each day, a
series of customers enter your diner and order a list of items
from the menu. You not only prepare their orders, but you also
make a list of who ordered what. At the end of the day, you
like to reflect back on w... | 26,362 |
Bad Packing
Description:
We have a knapsack of integral capacity and some objects of
assorted integral sizes. We attempt to fill the knapsack up,
but unfortunately, we are really bad at it, so we end up
wasting a lot of space that can’t be further filled by any of
the remaining objects. In fact, we are... | 26,363 |
Bag of Tiles
Description:
You and your friend are playing a game involving chance, and
you are interested in the odds of winning the game. The game
proceeds as follows:
* Your friend chooses $m$ tiles, each labeled with a
positive integer. He shows them to you, and puts them in a
bag. He then ... | 26,364 |
Baggage
Description:
An airline has two flights leaving at about the same time
from ICPCity, one to city B and one to city A. The airline also
has $n$ counters where
passengers check their baggage. At each counter there is a pair
of identical baggage bins, one for city B and one for city
A.
Just b... | 26,365 |
Bakice
Description:
When it comes to trams, a lot of people are civilized
individuals who know how to behave in one. However, there are
always those few who upon spotting a place to sit will run
towards it in supersonic speeds. If they spot more than one
place, they always try the closest one first.
P... | 26,366 |
Bakterije
Description:
Luka is bored in chemistry class yet again. This time, he’s
playing with intelligent bacteria. He has arranged his
$K$ bacteria on a
rectangular board divided in $N$ rows, labelled with numbers from
$1$ to $N$ starting from the top, and
$M$ columns, labelled with
numbers ... | 26,367 |
Balanced Cut
Description:
Professor Anna van Lier is preparing to give a lecture on
balanced binary search trees. Recall that these are binary
trees with two properties:
* Balanced tree: For every node, the height of
its left subtree and the height of its right subtree differ
by at most $1$. F... | 26,368 |
Balanced Diet
Description:
Appreciating the time savings, product consistency and
nutritional value of prepared foods, you have decided to eat
all your meals from cans. You have a shopping bag full of cans,
enough for the next two meals. You want to finish the entire
contents of all of these cans withi... | 26,369 |
Balanced Diet
Description:
Every day, Danny buys one sweet from the candy store and
eats it. The store has $m$
types of sweets, numbered from $1$ to $m$. Danny knows that a balanced diet
is important and is applying this concept to his sweet
purchasing. To each sweet type $i$, he has assigned a target
... | 26,370 |
Balanced Tree Path
Description:
You are given a tree where each node is annotated with a
character from ()[]{}. A path is a sequence
of one or more nodes where no node is repeated and every pair
of adjacent nodes is connected with an edge. A path is balanced
if the characters at each node, when concate... | 26,371 |
Balancing Art
Description:
Pete Tencious is a world-renowned artist who specializes in
mobiles. The San Francisco Museum of Art is currently
displaying a collection of his artwork entitled Balance I,
Balance II, Balance III, …, you get the idea. Each of
these works contains two or more spheres with wir... | 26,372 |
Balatro
Description:
You’re given some cards arranged in a row. Each card has a
value, and is one of two types: add, or multiply.
Compute the score for a row of cards as follows: Initially,
the score is zero. Then, process the cards from left to
right.
If it is an add card, increase the score by the card... | 26,373 |
Ball
Description:
There is a school dance scheduled tomorrow and $n$ students will attend. The students
are numbered from $1$ to
$n$. The students are
registered in pairs and the list of attendees is $\frac{n}{2} + 1$ lines long. Each
number also appears once in the list. But that doesn’t add up!
S... | 26,374 |
Ball Bearings
Description:
The Swedish company SKF makes ball bearings. As explained by
Britannica Online, a ball bearing is
“one of the two types of rolling, or anti friction,
bearings (the other is the roller bearing).
Its function is to connect two machine members that
move relative to one another... | 26,375 |
Ball Colors
Description:
Baby Timmy has a pool of balls that he plays with. The pool
is made up of balls with $n$ different colors with a certain
number of each color. Baby Timmy finds it interesting to order
these balls in a line given certain conditions he made. Timmy
has two conditions when playing ... | 26,376 |
Ball Tricks
Description:
RB is a basketball coach and he has several teams of
exceptionally skilled basketball players, who dominate
basketball leagues all over the world.
Why are RB’s players so good? The reason is that each of
them has already mastered exactly one ball trick – either the
Triple Spin... | 26,377 |
Ball of Whacks
Description:
Danny has a new toy called Ball of Whacks. It’s a rhombic
triacontahedron (which we all know is a thirty sided
polyhedron) made of small pyramid-shaped pieces which look like
the following:
When all $30$ pieces
are all put together, they form the object shown in Figure 2a.
... | 26,378 |
Balls and Bins
Description:
In the balls and bins game, you toss balls into
bins and try to earn some prize money.
In front of you are $N$
bins. Each turn, you throw a ball into one of the bins.
Unfortunately your aim is not so precise; maybe it is because
the bins are so far away. So, in each turn th... | 26,379 |
Balls and Needles
Description:
Joana Vasconcelos is a Portuguese artist who uses everyday
objects in her creations, like electric irons or plastic
cutlery. She is an inspiration to Ana, who wants to make
ceiling hanging sculptures with straight knitting needles and
balls of wool. For safety reasons, th... | 26,380 |
Baloni
Description:
There are $N$ balloons
floating in the air in a large room, lined up from left to
right. Young Perica likes to play with arrows and practice his
hunting abilities. He shoots an arrow from the left to the
right side of the room from an arbitrary height he chooses. The
arrow moves... | 26,381 |
Banana Problem
Description:
Gon is playing the game ‘Greedy Monkeys’.
The game is setup as follows:
* There are $N$
ladders, numbered from $1$ to $N$. Each ladder has height
$H$, and has
$H + 1$ steps at
height $0, 1 \ldots ,
H$. Let $(\ell ,
h)$ represent the step at ... | 26,382 |
Bandit Raids
Description:
Three rival gangs of bandits, the Marauders, the Attackers,
and the Plunderers, are fighting one another for a limited
supply of gold. Each gang has one member for each piece of gold
collectively owned by the gang. Every night one gang will raid
the hideout of another gang to ... | 26,383 |
Banjo
Description:
Having mastered the classic games Banjo-Kazooie and
Banjo-Tooie, Bob has moved on to playing their
secretly-released sequel, Banjo-Threeie. The game can be
modelled with a 2-dimensional coordinate system. The player’s
objective is simply to walk from one point to another as the
t... | 26,384 |
Bank Queue
Description:
However, there are too many people and only one counter is
open which can serve one person per minute. Greedy as Oliver
is, he would like to select some people in the queue, so that
the total amount of cash stored by these people is as big as
possible and that money then can wor... | 26,385 |
Bannorð
Description:
## Input
The first line of the input contains a non-empty string
$S$. The string
$S$ contains lower case
letters of the English alphabet and none of which is repeated.
The next line of the input contains the string $M$. The string $M$ contains only lower case letters
and space... | 26,386 |
Bar Classification
Description:
You are taking a course on machine learning at your
university, and as homework you have been tasked with writing a
program that can tell vertical bars from horizontal bars in
images. To generate some training data, you use the following
method. First, take an $N \times
... | 26,387 |
Bar Code
Description:
Bar Code is a puzzle game invented by Thinh Van Duc Lai in
2017 that was first published in the New York Times. Bar Code
is played on a square grid consisting of $n \times n$ unit squares with
$(n+1) \times (n+1)$ grid
points. For a given specification, the puzzle requires the
... | 26,388 |
Bar Shelf
Description:
Organ pipes, the von Trapp children, staircases—oh, how
Quark loves these things. For they are neatly arranged
ascending order, the very signal of cleanliness, structure,
civilisation. Quark is your fellow bartender at
Meson, the longest bar in the galaxy. Were it up to
Quark... | 26,389 |
Barcelona
Description:
Arnar, Benni and Unnar were at the airport in Barcelona on
their way to a competitive programming training camp. When the
plane had landed they exited and went to the baggage claim.
When they arrived there was no baggage on the conveyor belts.
After a few minutes the baggage star... | 26,390 |
Barcode
Description:
To prepare for ACM-ICPC 2017 in Saigon, the host univeristy
– Ho Chi Minh city University of Education (HCMUE) – decided to
print barcodes on the participants’ t-shirts. The barcode
requirement needs to be simple to reduce the cost but still
show some scientific style. HCMUE decide... | 26,391 |
Bard
Description:
Every evening villagers in a small village gather around a
big fire and sing songs.
A prominent member of the community is the bard. Every
evening, if the bard is present, he sings a brand new song that
no villager has heard before, and no other song is sung that
night. In the event ... | 26,392 |
Barica
Description:
Barica is an unusual frog. She lives in a pond where
$N$ plants float on the
surface of the water. The plants are numbered $1$ through $N$. When viewing from above, the
location of each plant is given by a pair of coordinates. What
makes Barica unusual is her fear of jumping diagona... | 26,393 |
Barking Up The Wrong Tree
Description:
Your dog Spot is let loose in the park. Well, relatively
loose – he is tied to a post with a leash, limiting his
movements. Spread around the park are various squeaky toys and
other dog paraphernalia, which Spot happily goes after when he
sees them. When he gets t... | 26,394 |
Base-2 Palindromes
Description:
A positive integer $N$
is a base-$b$
palindrome if the base-$b$ representation of $N$ (with no leading zeros) is a
palindrome, i.e. reads the same way in either direction.
For instance, $7$ (base
$10$) is a palindrome in
any base greater than or equal to $8$. It ... | 26,395 |
Baseball Court
Description:
After lengthy meetings on the subject, the NCPC jury has
decided that getting the contestants’ blood pumping would
result in better contests. Thus they figured it would be a good
idea to compete for bragging rights in some kind of sport prior
to the programming contest. For ... | 26,396 |
Based Porridge
Description:
Computer science students, like kindergarteners, care a lot
about fair outcomes: irregardless of whether this is achieved
through helping the low or keeping down the high. You are
hosting a sittning in Basen
for $N$ students. There
are K kinds of porridge and you have pr... | 26,397 |
Basic Basis
Description:
You are given a sequence of $n$ bit strings $b_1, b_2, \ldots , b_ n$, each with
$k \times 4$ bits.
You are also given another sequence of $m$ bit strings $a_1, a_2, \ldots , a_ m$, each also
with $k \times 4$
bits.
Let $f(x)$ denote the
minimum index $i$ such
that it is ... | 26,398 |
Basic Programming 1
Description:
You think you can code?
This problem will test you on various basic programming
techniques.
You are given two integers $N$ and $t$; and then an array $A$ of $N$ integers ($0$-based indexing).
Based on the value of $t$,
you will perform an action on $A$.
$t$
Action... | 26,399 |
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