First steps

Loops, arithmetic, I/O. Start here

Under construction

Still being built. Things may change

Total results2,362 problems

Algorithm Class - Algorithm Runtime 3
Easy1
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Cupcake Party
Easy1
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Football Scoring
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Left Beehind
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Provinces and Gold
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Autocomplete
Easy1
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Print Hanbyeol
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Problem Name
Easy1
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Problem Name
Easy1
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
A+B
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
5 MB
Judgeable
Canadians, eh?
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
SciComLove (2022)
Easy1
String, Math
No attempts yet
Time limit
1s
Memory limit
256 MB
Judgeable
finitefunc
Easy1
Hash map
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Sprout
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
99 Problems
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Culture shock
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Terraforming
Easy1
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Receipt
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Which problem number is the easiest in UCPC?
Easy1
Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Seongtaek's Secret Password
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Triathlon
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
MBTI
Easy1
Implementation, String
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Studying Pointers
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Calculating defense ignore
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Easy-to-Solve Expressions
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Soccer Standing Table
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Nice Raises
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Heavy Numbers
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Corona Virus Testing
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Microwave Mishap
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Sharing Birthdays
Easy1
Hash map, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Briefcases Full of Money
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Window on the Wall
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Electric Bill
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Majestic 10
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
I Love You, Yonsei
Easy1
Implementation
No attempts yet
Time limit
1.885s
Memory limit
1024 MB
Judgeable
Medal Ranking
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Lowercase Specific Uppercase Letters
Easy1
String, Hash map
No attempts yet
Time limit
0.1s
Memory limit
512 MB
Judgeable
My Grandfather
Easy1
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
WARBOY
Easy1
Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cup Covering
Easy1
Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Chronogram
Easy1
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Intercepting Information
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Picture
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Correct
Easy1
Implementation, Math
No attempts yet
Time limit
3s
Memory limit
1024 MB
Judgeable
Desni klik
Easy1
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Gum Gum for Jay Jay
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Absolutely
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
C3PO
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Decoder
Easy1
String, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Episodes
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Mutint
Easy1
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Acres
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Adding Integers
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Periods
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Population
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Poker Hand
Easy1
Hash map, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Pizza
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Copier
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Pups
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Triangle Height
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Counting points
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
The Missing Letter
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Match Score
Easy1
String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Socks
Easy1
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Smallest number
Easy1
Sorting, Implementation
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
Watch
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Hurra!
Easy1
Implementation, Math
No attempts yet
Time limit
6s
Memory limit
1024 MB
Judgeable
H4x0r
Easy1
Implementation, String
No attempts yet
Time limit
10s
Memory limit
1024 MB
Judgeable
Absolutely Flat
Easy1
Implementation, Brute force
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Recipe
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Message Decowding
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Krunch
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Rain Diary
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Border Cells
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Chessboard
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Commuter Train
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Room
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Asterisks
Easy1
Implementation, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Sasha and Zeros
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Elevator
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Comparing Rooms
Easy1
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
How many?
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Emoji Input Difficulty
Easy1
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Rectangle
Easy1
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Same Numbers
Easy1
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Three Boxes
Easy1
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Hour
Easy1
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Three-Way Comparison
Easy1
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Repeating String
Easy1
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Two-digit Integer
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
November (11月)
Easy1
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Marathon Race
Easy1
Array, Brute force
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Metronome
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Factorial 2
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Last Letter
Easy1
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Yes or No Vote
Easy1
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
512 MB
Judgeable
Location of Gudegi Co., Ltd.
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
CVE: Life is Way Too Short
Easy1
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Life
Easy1
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable

Title	Level	Topics	Solved	Time limit	Memory limit	Judge
Algorithm Class - Algorithm Runtime 3Given n, count how many times the innermost statement of a double loop runs and report the degree of that count as a polynomial.	Easy1	MathImplementation+1	No attempts yet	1s	512 MB	Judgeable
Cupcake PartyGiven R boxes of 8 cupcakes and S boxes of 3 cupcakes, find the number left after 28 students each take one.	Easy1	MathImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Football ScoringGiven each team's touchdowns, field goals, safeties, point-after kicks, and two-point conversions, compute each team's total score.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Left BeehindGiven the sweet and sour jar counts for each case, print whether Bill is left beehind, undecided, going to the convention, or never spoken to again at 13 jars.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Provinces and GoldGiven the counts of Gold, Silver, and Copper in a hand, find the best victory card and best treasure card Jake can afford with his total buying power.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
AutocompleteReads one letter and prints Naver D2 if it is N or n, otherwise prints Naver Whale.	Easy1	Implementation	No attempts yet	2s	1024 MB	Judgeable
Print HanbyeolThe task is to print the word Hanbyeol to standard output.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Problem NameThe statement is withheld, so the only instruction is to write an internet letter from the listed birth date, enlistment date, and name.	Easy1	Implementation	No attempts yet	2s	1024 MB	Judgeable
Problem NameA joke problem with no input that asks for a list of words taken from a letter, with no statement given.	Easy1	Implementation	No attempts yet	2s	1024 MB	Judgeable
A+BRead two integers A and B from one line and print their sum.	Easy1	ImplementationMath	No attempts yet	1s	5 MB	Judgeable
Canadians, eh?Given one line of text, decide whether it ends with the exact string eh? and print Canadian! or Imposter!.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
SciComLove (2022)Given N up to 10^9, print the string SciComLove after moving its first character to the end N times.	Easy1	StringMath	No attempts yet	1s	256 MB	Judgeable
finitefuncGiven a dictionary D, return the set of its values as a Python set.	Easy1	Hash map	No attempts yet	2s	1024 MB	Judgeable
SproutPrint a fixed sprout drawing exactly as shown in the example. The program takes no input and only writes the picture to standard output.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
99 ProblemsGiven a price N, find the positive integer closest to N that ends in 99, breaking ties toward the larger value.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Culture shockCount how many words in a sentence are he, him, she, or her, given N words on one line.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
TerraformingAdds up Mars oxygen, ocean, and temperature changes from a list and checks whether oxygen reaches 14%, oceans reach 9%, and temperature reaches +8 C.	Easy1	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
ReceiptGiven a printed receipt total and each item's price and quantity, check whether the sum of price times quantity equals the total.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Which problem number is the easiest in UCPC?Given a UCPC preliminary contest year from 2018 to 2022, print the letter of the easiest problem the setters intended that year.	Easy1	Implementation	No attempts yet	0.5s	1024 MB	Judgeable
Seongtaek's Secret PasswordGiven N strings, the task is to print yes for each string whose length is between 6 and 9 characters, otherwise no.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
TriathlonGiven N participants' scores a, d, and g, compute a times (d+g), doubled when a equals d+g, and print the highest score.	Easy1	Implementation	No attempts yet	1s	512 MB	Judgeable
MBTIGiven Jinho's MBTI type and N friends' types, count how many friends share Jinho's type.	Easy1	ImplementationString	No attempts yet	1s	512 MB	Judgeable
Studying PointersGiven N, print the declarations of an N-level pointer chain to the int variable a, one declaration per line, with pointers named ptr, ptr2, up to ptrN.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Calculating defense ignoreGiven N potions with percent defense ignore values, print the combined defense ignore after each drink using 1 - (1 - V)(1 - A_i).	Easy1	ImplementationMath	No attempts yet	1s	512 MB	Judgeable
Easy-to-Solve ExpressionsGiven three distinct integers, the task is to check whether one is the sum or the product of the other two, printing 1, 2, or 3.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Soccer Standing TableGiven five integers from a soccer standings row, print them in the order matches, wins, draws, losses, points.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Nice RaisesGiven a fixed raise and n salaries, count whether more members prefer the fixed raise or doubling their salary, printing 1, 2, or 0 on a tie.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Heavy NumbersGiven two integers up to 1,000,000, compute each number's digit count times its digit sum, then print 1 or 2 for the heavier one, or 0 on a tie.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Corona Virus TestingGiven g groups of p people and t positive groups, the task compares individual testing with group testing and prints which uses fewer kits.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Microwave MishapGiven an MM:SS entry that the microwave reads as HH:MM, print the extra cooking time as HH:MM:SS.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Sharing BirthdaysGiven n birthdays written as mm/dd, count how many distinct dates appear, with duplicates counted once.	Easy1	Hash mapString	No attempts yet	1s	1024 MB	Judgeable
Briefcases Full of MoneyGiven the bill counts for six denominations, print the denomination of the briefcase with the largest total, breaking ties by choosing the one with fewest bills.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Window on the WallGiven a wall's width, height, and border gap, find the area of the largest window that keeps the gap on every side.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Electric BillGiven two per-KWH rates and customer consumptions, the task prints each customer's bill, with the first 1000 KWH at the lower rate.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Majestic 10For each player's three stats, count how many are at least 10 and print the matching label (zilch, double, double-double, or triple-double).	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
I Love You, YonseiGiven the starting letter c, find the minimum total distance to step on the tiles spelling ILOVEYONSEI in order, where distance is the difference in alphabet positions.	Easy1	Implementation	No attempts yet	1.885s	1024 MB	Judgeable
Medal RankingFor each test case, read USA and Russia's gold, silver, and bronze counts and report whether USA wins by total medal count, by color order, both, or neither.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Lowercase Specific Uppercase LettersGiven a string A and a list B of uppercase letters, lowercase every occurrence of each letter in B within A and print the result.	Easy1	StringHash map	No attempts yet	0.1s	512 MB	Judgeable
My GrandfatherThe statement holds only a title and the placeholder word "Stattopic", so the task it asks for cannot be determined.	Easy1	Implementation	No attempts yet	2s	1024 MB	Judgeable
WARBOYGiven the competitor's price A, the competitor's performance B, and WARBOY's price C, find WARBOY's performance when its price-to-performance is 3 times the competitor's.	Easy1	Math	No attempts yet	1s	1024 MB	Judgeable
Cup CoveringGiven the area of a circle, output its diameter with an absolute or relative error of at most 1e-9.	Easy1	Math	No attempts yet	1s	1024 MB	Judgeable
ChronogramGiven text lines, sum the Roman numeral letter values (I, V, X, L, C, D, M) in each line and output the total as the year.	Easy1	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
Intercepting InformationGiven 8 readings that are each 0, 1, or 9, the task prints S if no reading is 9 and F otherwise.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
PictureThe task asks the solver to print a picture from the original contest, but the picture itself is missing from this statement.	Easy1	Implementation	No attempts yet	1s	512 MB	Judgeable
CorrectGiven a submission time HH:MM AM and a contest that started at 9:00 AM, print the number of minutes elapsed since the start.	Easy1	ImplementationMath	No attempts yet	3s	1024 MB	Judgeable
Desni klikFor each matrix, read the value of each column from the position of its single # and print the difference between the maximum and minimum values.	Easy1	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
Gum Gum for Jay JayCount the lines in an input file of unknown length and print that count.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
AbsolutelyGiven pairs of numbers on a line, the task is to print the distance between each pair with exactly one decimal place.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
C3POThe task asks the program to print a fixed ASCII picture of C3PO exactly as given.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
DecoderEach vowel in the encrypted text is shifted back one place in the cycle a, e, i, o, u, y, and the decoded lines are printed.	Easy1	StringSimulation	No attempts yet	1s	1024 MB	Judgeable
EpisodesPrint a fixed-format table listing each Star Wars episode number, title, and release date.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
MutintGiven several positive integers ending with a zero, change each number's leftmost largest digit: odd digits become 0, and even digits gain 4 (mod 10).	Easy1	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
AcresGiven the yard dimensions of a rectangular field, compute how many 5-acre seed bags are needed to plant all of it.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Adding IntegersRead n integers from input and print their sum.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
PeriodsEach input line is a sentence, and the task adds a period to any line that lacks one.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
PopulationGiven a starting population and an elapsed time, the task asks for the population after that time, with one birth every 4 seconds and one death every 7 seconds.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Poker HandGiven five cards per hand, the task is to find the largest number of cards that share the same rank.	Easy1	Hash mapImplementation	No attempts yet	1s	1024 MB	Judgeable
PizzaGiven a slice's area and price and a round pizza's radius and price, print which option gives more pizza per dollar for each dataset.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
CopierThe task reads n numbers and prints each one twice on its line, separated by a space.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
PupsGiven dog counts, food per dog, and price per pound for several cases, the task is to print the total cost of food for each case.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Triangle HeightGiven several triangle areas and base lengths, the task prints each triangle's height to two decimal places using h = 2a / b.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Counting pointsGiven a string of n test results (T or N), count the groups of n/10 consecutive tests where every test is solved, and print that count.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
The Missing LetterGiven 25 distinct uppercase English letters, print the one letter of the alphabet that is missing.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Match ScoreCount how many A and B characters are in a goal record string and print the score as X : Y.	Easy1	String	No attempts yet	1s	1024 MB	Judgeable
SocksGiven a string of B and C socks, count how many same-color pairs of socks can be formed.	Easy1	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Smallest numberGiven three digits, arrange them into the smallest three-digit number that does not start with a zero.	Easy1	SortingImplementation	No attempts yet	5s	1024 MB	Judgeable
WatchGiven the hour, minute, and second shown on a watch, print the time one second later in HH:MM:SS format.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Hurra!Print the numbers 1 to N, replacing multiples of 7 with Hurra!, multiples of 11 with Super!, and multiples of both with Wiwat!.	Easy1	ImplementationMath	No attempts yet	6s	1024 MB	Judgeable
H4x0rReplaces the letters a, e, i, o, and s in a lowercase string with the digits 4, 3, 1, 0, and 5 and prints the result.	Easy1	ImplementationString	No attempts yet	10s	1024 MB	Judgeable
Absolutely FlatGiven four leg lengths and one pad length, decide whether attaching the pad to at most one leg can make all four legs equal.	Easy1	ImplementationBrute force	No attempts yet	2s	1024 MB	Judgeable
RecipeGiven N ingredients with amounts at home, amounts needed, and unit prices, the task is to sum the cost of the missing amounts.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Message DecowdingDecode a message by mapping each letter through a 26-character substitution key, keeping case and spaces.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
KrunchGiven one sentence, remove all vowels from every word and print the sentence, dropping words that become empty.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Rain DiaryGiven today's day number n and the day m from the record two weeks ago, print the day number for last Sunday's record.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Border CellsGiven the dimensions m and n of a rectangle on a grid, count how many cells lie on its border.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
ChessboardGiven a number n from 1 to 64, print the chessboard square that Sasha numbered n, with rows numbered top to bottom.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Commuter TrainGiven the city and suburb station ranges on a train line, decide which fare applies to a trip from station s to station t.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
RoomGiven a room's width, length, and height in millimeters, decide whether the smaller side divided by the height is at least 2 and the larger side divided by the smaller is at most 2.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
AsterisksPrint n lines where line k has k squared asterisks, capped at 100 with three dots appended when the count exceeds 100.	Easy1	ImplementationSimulation	No attempts yet	1s	1024 MB	Judgeable
Sasha and ZerosGiven k, count the zeros in k's decimal form that are not trailing zeros.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
ElevatorGiven the elevator's floor k, Misha's floor n, and the per-floor times a (stairs) and b (elevator), find the time to reach floor n by each method.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Comparing RoomsGiven two rectangles' side lengths, the task is to print M, P, or E depending on which room has the larger area or whether the areas are equal.	Easy1	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
How many?Given the hour and whether alcohol is served, print 320 if it is lunch time (12 to 16) without alcohol, otherwise print 280.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
Emoji Input DifficultyGiven an emoji name like :chino_shock:, compute its input difficulty: its length plus the colon count plus 5 times the underscore count.	Easy1	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
RectangleGiven integers A and B, the task reads them as height and width and prints their product as the rectangle's area.	Easy1	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Same NumbersGiven a two-digit integer N, the task is to print 1 if its tens and ones digits are equal, otherwise print 0.	Easy1	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Three BoxesGiven a string of L and R moves, simulate a ball moving among three boxes starting at box 1 (clamped at the ends) and count how many times it enters box 3.	Easy1	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
HourGiven a number of days X, the task is to print how many hours are in X days, with each day being 24 hours.	Easy1	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Three-Way ComparisonGiven two integers A and B, the task is to print -1, 0, or 1 depending on whether A is less than, equal to, or greater than B.	Easy1	Implementation	No attempts yet	2s	1024 MB	Judgeable
Repeating StringGiven a string of length N, the task is to check whether its first half equals its second half and print Yes or No.	Easy1	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Two-digit IntegerGiven a tens digit A and a ones digit B, the task is to print the two-digit number formed by them.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
November (11月)Given day A of November 2022 and a number of weeks B, print 1 if the day B weeks later is still in November, otherwise 0.	Easy1	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Marathon RaceGiven N race times, output for each student the count of students with a strictly smaller time, plus one.	Easy1	ArrayBrute force	No attempts yet	2s	1024 MB	Judgeable
MetronomeGiven a tick count n, the task is to compute how many key revolutions give n ticks, at four ticks per revolution, printed to two decimals.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Factorial 2Given an integer N from 0 to 20, the task is to print N factorial.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Last LetterGiven a string S, print the result of removing its last character if that character is G, or appending G to the end otherwise.	Easy1	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Yes or No VoteGiven N votes coded as 1, -1, or 0, decide whether the vote is APPROVED, REJECTED, or INVALID when abstentions are at least half.	Easy1	ImplementationMath	No attempts yet	2s	512 MB	Judgeable
Location of Gudegi Co., Ltd.The task prints the latitude and longitude of Gudegi Co., Ltd. as two real numbers, with no input to read.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable
CVE: Life is Way Too ShortGiven n up to 100,000, the task is to print 2 raised to the power n as a full decimal number.	Easy1	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
LifePrint your own ID without using any character that appears in the ID, with no input given.	Easy1	Implementation	No attempts yet	1s	1024 MB	Judgeable