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Total results2,365 problems

Takeoff
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Hive
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Photos
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Data Transmission
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Fraction Magic
Easy2
Brute force, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Kaprekar Transformation
Easy2
Sorting, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Shuffle the inner letters
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Sandwich Preparation
Easy2
Implementation, Brute force
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Lefffft!
Easy2
Simulation, Implementation+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Languages
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Slot Machine
Easy2
Hash map, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Map
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Optical Character Recognition
Easy2
Array, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Sequence
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Generalized Twin Primes
Easy2
Number theory, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Two Formats
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Train Seat
Easy2
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Triangle
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Diagonal Dominance
Easy2
Matrix, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
GPA Calculator
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Football Championship
Easy2
Sorting, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Laptop
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Curling
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Radio-Controlled Car Race
Easy2
Brute force, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Time Standards
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Phone Unlock
Easy2
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Return Match
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Real Number
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Which Team Should Receive the Sponsor Prize?
Easy2
Implementation, Array
No attempts yet
Time limit
8s
Memory limit
1024 MB
Judgeable
Morse Code
Easy2
String, Hash map+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Beusil's Ttibu-Ttibu Sticker Collection
Easy2
Hash map, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Problems No Larger Than the Weeds
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
So, how many problems have you solved?
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Brsil Comet
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
What Is in the Apple Box? Cash?
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Dynamic Array
Easy2
Implementation, Simulation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
3D Minesweeper
Easy2
Array, Simulation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Where Is My Package
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Goodbye, Code Jam
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Longest Streak
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Minimum Grade
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Find the Hanyang Student ID!
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Manhattan Parcel Robot
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Palindrome
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Character Frequencies
Easy2
Hash map, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Two-Move Knight
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Distributing plates
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Important Messages
Easy2
Hash map, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Unreadable Text
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Average scores
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Maximum Climb
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Subtracting fractions
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Frog Matching
Easy2
Greedy, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cheeseburger Making
Easy2
Greedy, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
ZOAC 6
Easy2
String, String matching
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Concert
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Dešifravimas (Decryption)
Easy2
String, Simulation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Painting the Fence
Easy2
Simulation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Hello, World!
Easy2
String, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Minesweeper
Easy2
Matrix, Implementation+1
No attempts yet
Time limit
4s
Memory limit
1024 MB
Judgeable
Cookie Piles
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Distinct Digits
Easy2
Brute force, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Age Expression
Easy2
Brute force, Math
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
Increasing Sublist
Easy2
Array, Implementation
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
Let's Portmanteau
Easy2
String, Implementation
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
We Want You Happy!
Easy2
Simulation, Implementation
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
Finding Your Roots
Easy2
Implementation, Linked list
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Hurricane Warning
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Random Number Generator
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Lectures
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cargo Ship
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
King's Keep
Easy2
Brute force, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Advance to Taoyuan Regional
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Traffic Light
Easy2
Math, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Telephone Numbers
Easy2
Implementation, Sorting
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Target
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Making a Rainbow
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Reveals
Easy2
Implementation, Hash map+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Reverse
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Happiness Score
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Find the Zebra!
Easy2
String, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Floor Number
Easy2
Implementation, Math
No attempts yet
Time limit
0.2s
Memory limit
1024 MB
Judgeable
Why Hoban-woo Was Late for School 1
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Deciphering WordWhiz
Easy2
Implementation, String
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Democratic Naming
Easy2
Array, Hash map+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cornhusker
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
ISBN Conversion
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Anti-Palindrome
Easy2
String, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cuckoo! Cuckoo!
Easy2
Implementation, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Attendance
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Guess Who
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Wall
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Pop-It
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Knob
Easy2
Simulation, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Sudoku
Easy2
Implementation, Matrix
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Pique Esconde
Easy2
Implementation, Math
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
The Last Shall Be First
Easy2
Array, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Lottery Failure
Easy2
Math, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Choosing the Morgorithm President
Easy2
String, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Flight Delays
Easy2
Simulation, Array
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable

Title	Level	Topics	Solved	Time limit	Memory limit	Judge
TakeoffGiven the plane mass, passenger masses, and the fuel ratio alpha, find the minimum fuel mass for takeoff or report Impossible.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
HiveGiven the size n of a hexagonal hive built from rings around one center cell, print the total number of cells.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
PhotosGiven a numbered list of photo file names and a list of intervals of photo numbers, output the file names in each interval in order.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
Data TransmissionGiven two binary strings s and t, the task is to decide whether t equals s or differs from it by one swap of adjacent bits.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Fraction MagicGiven fractions p1/q1 and p2/q2 and the denominator b of a/b, find the smallest integer numerator a with p1/q1 < a/b < p2/q2, or -1 if none exists.	Easy2	Brute forceMath	No attempts yet	2s	1024 MB	Judgeable
Kaprekar TransformationGiven x, the task is to rearrange its digits into the largest and smallest numbers and print their difference, padded to the digit count of x.	Easy2	SortingImplementation	No attempts yet	2s	1024 MB	Judgeable
Shuffle the inner lettersGiven a text, shuffle the inner letters of each word while keeping the first and last letters fixed, leaving words unchanged when no different arrangement exists.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Sandwich PreparationGiven four axis-aligned rectangles on a grid, find the area of their union so overlapping cells are counted once.	Easy2	ImplementationBrute force	No attempts yet	2s	1024 MB	Judgeable
Lefffft!Track a three-cell soldier drawn on a character grid through turn and forward-step commands, then print the grid with the soldier at its final position.	Easy2	SimulationImplementation+1	No attempts yet	2s	1024 MB	Judgeable
LanguagesGiven names for digits 0 to 9, find for each number the digit in it whose name comes last in alphabetical order.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Slot MachineGiven a table of winning combinations with prizes and m machine results, find the net change in capital when each game costs 10 rubles.	Easy2	Hash mapImplementation	No attempts yet	2s	1024 MB	Judgeable
MapGiven n scraps and k parts per tear, find how many seconds t Vasya tore the map, or print -1 if no such t exists.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Optical Character RecognitionGiven n binary character samples and one binary image of the same size, print the 1-based index of the sample that matches the most cells.	Easy2	ArraySimulation	No attempts yet	2s	1024 MB	Judgeable
SequenceGiven a sequence, find the longest subsequence that is not strictly increasing, and print its length and indices, or 0 if none exists.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
Generalized Twin PrimesGiven n and k, count the prime pairs (p, q) with q - p = k and q at most n. The bounds are at most 10^4, so a sieve suffices.	Easy2	Number theoryMath	No attempts yet	2s	1024 MB	Judgeable
Two FormatsGiven N as read on a little-endian device after a big-endian transfer, recover the original number M by reversing its three bytes.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Train SeatGiven a car type (R or C) and a seat number, print the compartment, whether the seat is a side seat, and whether it is upper or lower, or -1 if the seat does not exist.	Easy2	Implementation	No attempts yet	2s	1024 MB	Judgeable
TriangleGiven the three side midpoints of a hidden triangle, print the coordinates of its three vertices.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Diagonal DominanceGiven an n by n matrix of nonnegative integers, check whether it is diagonally dominant and count the strictly dominant diagonal elements.	Easy2	MatrixImplementation	No attempts yet	2s	1024 MB	Judgeable
GPA CalculatorGiven a string of concatenated letter grades such as A+ and B, print the arithmetic mean of their grade points.	Easy2	StringImplementation	No attempts yet	1s	512 MB	Judgeable
Football ChampionshipGiven the standings before the final match, find Vasya's team's rank if it wins, draws, or loses that match, with ties broken by name.	Easy2	SortingImplementation	No attempts yet	2s	1024 MB	Judgeable
LaptopGiven the times when a laptop switches between mains and battery, find the battery charge percentage at 23:59, with full charge taking y minutes and full drain taking x minutes.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
CurlingFor each end, find the team with the stone closest to the origin and count its stones closer than every opposing stone, then print the totals as a:b.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Radio-Controlled Car RaceGiven each car's head start and constant speed, find the earliest time at which two cars are at the same distance from the start.	Easy2	Brute forceMath	No attempts yet	2s	1024 MB	Judgeable
Time StandardsGiven two time standards that set the hours, minutes, and seconds per unit, convert a moment from the first standard to the same moment in the second.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Phone UnlockChecks whether three pairwise different keys pressed in order form a straight horizontal or vertical line on the keypad.	Easy2	Implementation	No attempts yet	2s	1024 MB	Judgeable
Return MatchGiven the first leg score and the live second leg score, decide whether the tie can end level on total goals and away goals.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
Real NumberGiven a real number x with 0 <= x < 1 and an integer k, round x to k digits after the decimal point, carrying 9s upward as needed.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Which Team Should Receive the Sponsor Prize?For each dataset, find the team whose elapsed time is closest to 2023 seconds and print its team number.	Easy2	ImplementationArray	No attempts yet	8s	1024 MB	Judgeable
Morse CodeGiven a Morse code message with characters separated by spaces, the task is to decode it back into the original string of length N.	Easy2	StringHash map+1	No attempts yet	1s	1024 MB	Judgeable
Beusil's Ttibu-Ttibu Sticker CollectionGiven N uppercase letter stickers, find how many full copies of the word BRONZESILVER can be spelled from them.	Easy2	Hash mapString	No attempts yet	1s	1024 MB	Judgeable
Problems No Larger Than the WeedsCount how many problems have a total character size no greater than the weed size J, where uppercase letters are 4, lowercase letters and digits are 2, and spaces are 1.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
So, how many problems have you solved?Given N, M, and K, find the minimum and maximum problems solved so far when reaching a total of N needs at least M per day for at least K days.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Brsil CometGiven a date on a 360-day calendar and a period N, the task is to find the next date after today that is a multiple of N days later.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
What Is in the Apple Box? Cash?Given apple and pear juice boxes with their sizes, compute the total mass of the boxes and the market value of the apples inside.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Dynamic ArraySimulate store and delete commands on a dynamic array that doubles when full, then print its final maximum size.	Easy2	ImplementationSimulation+1	No attempts yet	1s	1024 MB	Judgeable
3D MinesweeperGiven a 3D grid of mines and empty cells, print each empty cell's count of adjacent mines (up to 26 neighbors) modulo 10.	Easy2	ArraySimulation+1	No attempts yet	1s	1024 MB	Judgeable
Where Is My PackageGiven the shift start and end times, the count of earlier packages, and the minutes per delivery, find the day offset and clock time when Bsil's package arrives.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Goodbye, Code JamGiven a contestant's rank in their last round, output the last Code Jam round they entered, using the cutoffs of 4500, 1000, and 25.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
Longest StreakGiven daily solve counts for N days, the task is to find the longest run of consecutive days with at least one solved problem.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
Minimum GradeGiven the grades of N-1 courses and a target GPA, find the lowest grade for the last course that makes the truncated semester average exceed the target.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Find the Hanyang Student ID!Given up to five Suneung standard scores, compute the Hanyang student ID from a fixed formula of score differences and products.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Manhattan Parcel RobotGiven a string of N moves (N, E, S, W), find the fewest steps back to the warehouse, which is the Manhattan distance of the net displacement.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
PalindromeGiven four integers from 1 to 9, decide whether changing at most one element makes the sequence a palindrome, and print one such palindrome or EI.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
Character FrequenciesCount how many times each non-whitespace character appears in N lines of text and print each character with its count.	Easy2	Hash mapString	No attempts yet	1s	1024 MB	Judgeable
Two-Move KnightGiven a knight's starting square on a chess board, list every square the knight can reach in exactly two moves.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
Distributing platesFind the smallest starting seat from which Juku can hand out plates so that every friend receives a clean plate.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
Important MessagesCount how many message sender addresses appear in a given contact list of email addresses.	Easy2	Hash mapString	No attempts yet	1s	1024 MB	Judgeable
Unreadable TextGiven N topics and a pattern where '*' marks each unreadable letter, list every topic that matches the pattern in input order.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
Average scoresGiven each playthrough's player and points, print M, J, or V for whose average score is higher, or whether the averages are equal.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Maximum ClimbGiven N course heights, find the largest difference between the end and start of a run of consecutive strictly increasing heights.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
Subtracting fractionsSubtracts the fraction c/d from a/b read from a file, then prints the reduced result both as a plain fraction and as a formatted mixed number.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Frog MatchingGiven Juho at S and N frogs at E_i, find the frog whose jump-then-walk meeting costs the least stamina, and print that cost and its number.	Easy2	GreedyImplementation	No attempts yet	1s	1024 MB	Judgeable
Cheeseburger MakingGiven A patties and B cheese slices, find the largest cheeseburger where the patty count is exactly one more than the cheese count.	Easy2	GreedyMath	No attempts yet	1s	1024 MB	Judgeable
ZOAC 6Count the sentences that contain the substring 01 or OI, since each such sentence gets one Yeongil emoticon.	Easy2	StringString matching	No attempts yet	1s	1024 MB	Judgeable
ConcertGiven seat assignments with one empty seat, count how many listeners must move when listener 1 displaces occupants in a chain until someone reaches the empty seat.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
Dešifravimas (Decryption)Given a partly encrypted Caesar cipher message and the full encrypted message, find the key from the first differing letter and decrypt the full message.	Easy2	StringSimulation+1	No attempts yet	1s	1024 MB	Judgeable
Painting the FenceGiven scrape and paint times per post and Tomas's head start, find the total minutes Barbora spends waiting for posts to be scraped.	Easy2	SimulationMath	No attempts yet	1s	1024 MB	Judgeable
Hello, World!Given N SPAUSDINTI commands, print the text inside each pair of quotes in order, turning the newline marker into a line break.	Easy2	StringSimulation	No attempts yet	1s	1024 MB	Judgeable
MinesweeperGiven a solved Minesweeper board, check that every digit equals the number of flagged squares next to it.	Easy2	MatrixImplementation+1	No attempts yet	4s	1024 MB	Judgeable
Cookie PilesGiven N cookie piles whose heights start at A and rise by D per pile, find the total number of cookies.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Distinct DigitsGiven l and r up to 10^5, the task finds any number in the range whose digits are all different, or reports -1.	Easy2	Brute forceMath	No attempts yet	1s	1024 MB	Judgeable
Age ExpressionGiven Dr. O's age N and the ages A and K of his granddaughters, decide whether positive integers a and k satisfy aA + kK = N.	Easy2	Brute forceMath	No attempts yet	5s	1024 MB	Judgeable
Increasing SublistGiven a list of at most 30 integers, find the length of the longest run of consecutive strictly increasing elements.	Easy2	ArrayImplementation	No attempts yet	5s	1024 MB	Judgeable
Let's PortmanteauGiven two words, build a portmanteau from the first word's leading consonants, one merging vowel, and the second word's trailing consonants, then print it.	Easy2	StringImplementation	No attempts yet	5s	1024 MB	Judgeable
We Want You Happy!Given arrival, service, and patience times for n customers served in arrival order by one teller, list the customers who are processed without leaving.	Easy2	SimulationImplementation	No attempts yet	5s	1024 MB	Judgeable
Finding Your RootsFor each data set, count how many lions lie on the parent chain from lion L upward, including L, until the chain reaches an unknown parent.	Easy2	ImplementationLinked list	No attempts yet	1s	1024 MB	Judgeable
Hurricane WarningFor each data set, count the people whose consumed media string shares at least one letter with the media string the authorities use for the warning.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Random Number GeneratorGiven N digits drawn as 9 by 8 pictures of dots and hashes, print the number those digits form.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
LecturesGiven ten weekly lecture slots, find two that overlap in day and time, or if none do, report the total lecture time.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
Cargo ShipGiven a deck of a by b meters and cars of c by d meters, decide whether all n cars fit, and if not, find the maximum that do.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
King's KeepGiven k points, find the minimum over all points of the average Euclidean distance from that point to the other k-1 points.	Easy2	Brute forceMath	No attempts yet	1s	1024 MB	Judgeable
Advance to Taoyuan RegionalGiven a 2023 date, the task is to print TOO LATE if it falls less than 35 days before October 21, 2023, and GOOD otherwise.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Traffic LightGiven drive time M, lap time N, and red interval T, find the laps completed before Mantas first hits a red light, or report that he never stops.	Easy2	MathSimulation	No attempts yet	1s	1024 MB	Judgeable
Telephone NumbersGiven a list of numbers, the task finds the smallest one whose digits are all equal or strictly increasing, or prints NERASTA if none exists.	Easy2	ImplementationSorting	No attempts yet	1s	1024 MB	Judgeable
TargetGiven a window grid, a target grid, and a wind offset, find the smallest TX+TY over target cells the arrow can land on, or report NEPATAIKYS if none exists.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Making a RainbowGiven a string of letters, decide whether it has enough lowercase, uppercase, or both to spell ROYGBIV, then print yes, YES, YeS, or NO!.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
RevealsGiven the people in a house and the names seen outside, find the culprit by applying seven priority rules in order.	Easy2	ImplementationHash map+1	No attempts yet	1s	512 MB	Judgeable
ReverseGiven six output lines from related problems, print one possible input for each problem in order.	Easy2	StringImplementation	No attempts yet	1s	512 MB	Judgeable
Happiness ScoreGiven one message, count letters that appear in HAPPY and SAD, then print the happiness index as a percentage rounded to two decimals.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Find the Zebra!Count the runs of 1s in each zebra's coat string, then print the maximum run count and how many zebras reach it.	Easy2	StringImplementation	No attempts yet	0.5s	1024 MB	Judgeable
Floor NumberGiven a floor number N and a digit count L, print an L-digit number with no leading zero whose repeated digit-product reduces to N.	Easy2	ImplementationMath	No attempts yet	0.2s	1024 MB	Judgeable
Why Hoban-woo Was Late for School 1Given four stats and a target N, find the fewest +1 blessings needed so the average of the four stats is at least N.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Deciphering WordWhizGiven the secret word and the feedback for each guess, count the dictionary words that would produce that exact feedback against the secret.	Easy2	ImplementationString	No attempts yet	0.5s	1024 MB	Judgeable
Democratic NamingGiven n city names of length m, build the county name by picking, for each position, the letter most cities have there, breaking ties alphabetically.	Easy2	ArrayHash map+1	No attempts yet	1s	1024 MB	Judgeable
CornhuskerGiven five ears' kernel rows and lengths, plus the ear count and kernel weight factor, the task prints the integer bushels per acre estimate.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
ISBN ConversionGiven ISBN-10 strings that may contain hyphens, check each one's placement and checksum, then print the ISBN-13 with 978 prepended or print invalid.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Anti-PalindromeGiven one line of text, decide whether it contains a palindrome of two or more letters after ignoring non-letters and case.	Easy2	StringBrute force	No attempts yet	1s	1024 MB	Judgeable
Cuckoo! Cuckoo!Given a 12-hour clock time and a count N, find the clock time at which the cuckoo has sounded N times in total.	Easy2	ImplementationSimulation	No attempts yet	1s	1024 MB	Judgeable
AttendanceGiven a log of called names and Present! replies, print the names of students who never answered Present!, in the order they were called.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Guess WhoCount the characters whose attributes match every given answer, then print the index if exactly one matches or the number of matches otherwise.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
WallApply an elementary cellular automaton rule, given by its decimal number, to a starting row for K generations and print each new generation.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
Pop-ItGiven an h by w grid of 0s and 1s, find the fewest cells to flip so that every cell has the same value.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
KnobGiven left and right knob directions for T beats, sum a point for each knob repeating its previous direction and a point for both knobs turning the same way on one beat.	Easy2	SimulationImplementation	No attempts yet	0.5s	1024 MB	Judgeable
SudokuGiven a partially filled 9x9 sudoku grid, decide whether any row, column, or 3x3 subgrid repeats a digit.	Easy2	ImplementationMatrix	No attempts yet	1s	1024 MB	Judgeable
Pique EscondeGiven n children, the searcher m, and the n-2 children already found, output the number of the one child still missing.	Easy2	ImplementationMath	No attempts yet	0.5s	1024 MB	Judgeable
The Last Shall Be FirstGiven the first-phase ranking of n teams from one state, print each team's predicted second-phase position, which reverses their first-phase order.	Easy2	ArrayImplementation	No attempts yet	0.5s	1024 MB	Judgeable
Lottery FailureFor each integer of up to 30 digits until 0, print PREMIADO if it is a multiple of 42, otherwise print TENTE NOVAMENTE.	Easy2	MathImplementation	No attempts yet	0.5s	1024 MB	Judgeable
Choosing the Morgorithm PresidentGiven N distinct uppercase names, print the one that comes first in dictionary order among those with exactly three characters.	Easy2	StringArray	No attempts yet	1s	1024 MB	Judgeable
Flight DelaysGiven scheduled times t_i and a gap k, output each flight's departure: the max of t_i and the previous departure plus k.	Easy2	SimulationArray	No attempts yet	2s	1024 MB	Judgeable