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Total results2,362 problems

Zayo Bayo
Easy2
Simulation, Implementation+2
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Algorithm Class - Asymptotic Notation 4
Easy2
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Algorithm Class - Asymptotic Notation 5
Easy2
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Algorithm Class - Asymptotic Notation 6
Easy2
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Three Matches
Easy2
Implementation, Sorting+2
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Eye of Sauron
Easy2
String, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Algorithm Class - Fibonacci Number 1
Easy2
Implementation, Math+2
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Piano Competition
Easy2
Array, Implementation+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Library 2
Easy2
Stack, Simulation+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Dodo Learns Time Complexity
Easy2
String, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Fergusonball Ratings
Easy2
Implementation, Math+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Harp Tuning
Easy2
String, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Espresso!
Easy2
Simulation, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Ultimate Binary Watch
Easy2
Bit manipulation, Implementation+2
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Scaling Recipe
Easy2
Math, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Double Password
Easy2
Math, Combinatorics+2
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Average Character
Easy2
String, Math+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Blocks
Easy2
Backtracking, Brute force+2
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Green Tower
Easy2
Brute force, Implementation
No attempts yet
Time limit
2.022s
Memory limit
319 MB
Judgeable
Pooling PCR Tests
Easy2
Math, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Transporting Spaghetti
Easy2
Math, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Betting
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Mia
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Beehives
Easy2
Brute force, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Carousel Rides
Easy2
Implementation, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
The Amazing Human Cannonball
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Kitten on a Tree
Easy2
Tree, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Number Fun
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Turtle Master
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Saving Princess Peach
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Climbing Worm
Easy2
Math, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Math Homework
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Broken Swords
Easy2
Implementation, Greedy
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Good Messages
Easy2
String, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Broken Calculator
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Two Rabbits
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
256 MB
Judgeable
Friendly Rooks
Easy2
Implementation, Greedy
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Counting Antibodies
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Calendar of Alpha Centauri
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Binary Game 2
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Patchwork
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Trip Odometer
Easy2
Array, Sorting
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Time and Date
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
August14 Beginner Contest
Easy2
Implementation, Hash map
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Organizing SWERC
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
2048 MB
Judgeable
Punched Cards
Easy2
Implementation, String
No attempts yet
Time limit
5s
Memory limit
1024 MB
Judgeable
KHL
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
TiM
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Ari's Clever Portal Trip
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
두~~부 두부 두부
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Searching for Sogang's History
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
One Shot at Life
Easy2
String, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cake slices
Easy2
Brute force, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Gahee and Ignoring Defense Rate
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Military Service Examination
Easy2
Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
November 11
Easy2
Implementation, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Cutline
Easy2
Sorting, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Coding Is a Physical Education Subject
Easy2
String, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Measuring Student Popularity
Easy2
Hash map, Sorting+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Multi-Field Preference Survey (Small)
Easy2
Implementation, Brute force
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
A Very Simple Problem
Easy2
Math, Number theory
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Bread
Easy2
Implementation, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Simple Problem (Small)
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
AirPods
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Linked Master Ims
Easy2
String, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Counting Peaks of Infection
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Navigation
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Puang and Jongyun
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Shuttle Bus
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Making Hamburgers
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Odd-Even Sequence
Easy2
Sorting, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Palindrome Sotteok-Sotteok
Easy2
String, Two pointers
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Attendance Event
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Computation - Task 1
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Computation - Task 5
Easy2
Bit manipulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Mirror Reflection
Easy2
Matrix, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Minigames with Ims
Easy2
Hash map, Math
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Number Maximization
Easy2
Sorting, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Easy-to-Pronounce Words
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Decimal XOR
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Odd/Even Strings
Easy2
String, Hash map
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Changing Strings
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cat's Age
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Presidential Election
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Digit Count
Easy2
Implementation, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Judging Assistant for Contest
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
A Game Called Mind
Easy2
Sorting, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Parity of Strings
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
SGA President
Easy2
Hash map, String+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Simplified Keyboard
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Hi Cleopatra, the Best Potato Chip in the World
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Polar Bear Tears Brackets
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Find the Twins
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Brownies vs. Candies vs. Cookies
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Is the APC sorted from easy to hard?
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Mission Donation
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Fastest Function
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
2048 MB
Judgeable
HI-ARC
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Similar Phone Numbers
Easy2
String, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Big Yield
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable

Title	Level	Topics	Solved	Time limit	Memory limit	Judge
Zayo BayoGiven x cabbages, a travel time of n days per trip, and a start date, find the date when the last cabbage reaches home.	Easy2	SimulationImplementation+2	No attempts yet	1s	1024 MB	Judgeable
Algorithm Class - Asymptotic Notation 4Given a quadratic f(n) and constants c, n0, decide whether f(n) <= c*n^2 holds for every n >= n0.	Easy2	MathImplementation+1	No attempts yet	1s	512 MB	Judgeable
Algorithm Class - Asymptotic Notation 5Given a quadratic f(n) and positive c, n0, decide whether c*n^2 <= f(n) holds for every n >= n0, printing 1 or 0.	Easy2	MathImplementation+1	No attempts yet	1s	512 MB	Judgeable
Algorithm Class - Asymptotic Notation 6Given a quadratic f(n)=a2n^2+a1n+a0 and constants c1, c2, n0, decide whether c1n^2 <= f(n) <= c2n^2 holds for every n >= n0.	Easy2	MathImplementation+1	No attempts yet	1s	512 MB	Judgeable
Three MatchesGiven three matches on a line, find the minimum number to light so fire spreads to all, and report the shortest and longest lengths.	Easy2	ImplementationSorting+2	No attempts yet	1s	1024 MB	Judgeable
Eye of SauronGiven a string of bars surrounding a single matched pair of parentheses, decide whether the bar counts on the left and right sides are equal.	Easy2	StringImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Algorithm Class - Fibonacci Number 1Given n, count how many times the base case of naive recursive Fibonacci runs and how many times the DP loop body runs.	Easy2	ImplementationMath+2	No attempts yet	1s	512 MB	Judgeable
Piano CompetitionGiven N distinct judge scores, output the sum of all scores except the highest and the lowest.	Easy2	ArrayImplementation+1	No attempts yet	2s	1024 MB	Judgeable
Library 2Process a sequence of push and pop actions on a stack of book titles, printing the title each time a READ pop occurs.	Easy2	StackSimulation+1	No attempts yet	2s	1024 MB	Judgeable
Dodo Learns Time ComplexityGiven lines of lowercase text, count how many times the substrings "for" and "while" appear on each line and print the largest count.	Easy2	StringImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Fergusonball RatingsFor each player, compute 5 times points minus 3 times fouls, count how many exceed 40, and mark the team gold if all do.	Easy2	ImplementationMath+1	No attempts yet	1s	1024 MB	Judgeable
Harp TuningSplit one line of concatenated harp tuning instructions into separate lines showing the strings, tighten or loosen, and the turn count.	Easy2	StringImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Espresso!Given orders of 1 to 4 shots (latte adds one ounce) and a tank of s ounces, count refills needed to serve all orders in order.	Easy2	SimulationImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Ultimate Binary WatchGiven a 24-hour time as four digits, print a four-column binary LED watch face with asterisks for set bits and periods for clear bits.	Easy2	Bit manipulationImplementation+2	No attempts yet	1s	1024 MB	Judgeable
Scaling RecipeScale each ingredient amount from a recipe that makes x portions so it makes y portions instead.	Easy2	MathImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Double PasswordGiven two four-digit passwords, count how many four-digit sequences match at least one password in every digit position.	Easy2	MathCombinatorics+2	No attempts yet	1s	1024 MB	Judgeable
Average CharacterGiven a printable ASCII string, output the character whose ASCII value is the floor of the average of all characters' ASCII values.	Easy2	StringMath+1	No attempts yet	1s	1024 MB	Judgeable
BlocksGiven four blocks with six letters each, decide for each short word whether its letters can be assigned to distinct blocks that contain them.	Easy2	BacktrackingBrute force+2	No attempts yet	1s	1024 MB	Judgeable
Green TowerCount the shortest downward paths from the top of an N-floor Green Tower to the yellow floor, moving one adjacent floor at a time over visible blocks.	Easy2	Brute forceImplementation	No attempts yet	2.022s	319 MB	Judgeable
Pooling PCR TestsGiven the chance p that one person tests positive, find the pool size N (2 to 16) that minimizes expected PCR tests per person, or print 1.	Easy2	MathBrute force	No attempts yet	1s	1024 MB	Judgeable
Transporting SpaghettiFind the fewest full trucks from Milan so that Mestre keeps exactly D tons and the rest, shipped in full boats, is at least C tons for Venice.	Easy2	MathBrute force	No attempts yet	1s	1024 MB	Judgeable
BettingGiven the percentage a of switch points bet on option one, print the payout ratio x for each option, where the ratio is 1:x.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
MiaGiven two dice rolls for each player, decide who wins under Mia scoring: Mia is highest, then doubles, then the larger digit first.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
BeehivesGiven hive coordinates and a distance d, count the hives within d of another hive (sour) and the hives with no such neighbor (sweet).	Easy2	Brute forceMath	No attempts yet	1s	1024 MB	Judgeable
Carousel RidesFor each test case, pick the offer with the lowest price per ticket among those buying at most m tickets, breaking ties toward the offer that buys more tickets.	Easy2	ImplementationBrute force	No attempts yet	1s	1024 MB	Judgeable
The Amazing Human CannonballFor each test case, the task checks whether the cannonball's height where it crosses the wall is at least 1 m above the lower edge and at least 1 m below the upper edge.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Kitten on a TreeGiven a tree as parent lines with their child branches and the kitten's branch K, print the path from K up to the root.	Easy2	TreeImplementation	No attempts yet	1s	1024 MB	Judgeable
Number FunGiven triples a, b, c, the task is to check whether c equals a+b, a-b, b-a, a*b, a/b, or b/a for one operation, printing Possible or Impossible.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Turtle MasterSimulate a turtle program on an 8 by 8 board with F, R, L, X moves and report whether it reaches the diamond without errors.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Saving Princess PeachGiven N obstacles and Mario's list of finds with repeats, print the numbers he missed in increasing order, then the count of distinct obstacles he found.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
Climbing WormGiven a climb a, a slide b, and a pole height h, the task is to count how many crawls the worm needs to reach the top.	Easy2	MathSimulation	No attempts yet	1s	1024 MB	Judgeable
Math HomeworkGiven the leg counts b, d, c of three animal types and a total of l legs, list every count triple whose legs add up to l, or print impossible.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
Broken SwordsGiven which slats of each broken sword are broken, count how many swords Ken can rebuild and how many T/B and L/R slats remain.	Easy2	ImplementationGreedy	No attempts yet	1s	1024 MB	Judgeable
Good MessagesApplies a Caesar shift to a message up to N times and counts steps where vowels (including y) are at least half the consonants, printing Boris or Colleague.	Easy2	StringSimulation	No attempts yet	1s	1024 MB	Judgeable
Broken CalculatorSimulate a broken calculator whose four operators each use the previous result, and print the displayed value after each command.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
Two RabbitsTwo rabbits hop toward each other by fixed distances each second; find the time they land on the same point, or -1 if they never do.	Easy2	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Friendly RooksPlace k rooks on an n by m board so that no two rooks share a row or column, or report Impossible when that cannot be done.	Easy2	ImplementationGreedy	No attempts yet	1s	512 MB	Judgeable
Counting AntibodiesGiven the gene fragment counts for the kappa, lambda, and heavy chains, count how many distinct antibody molecules can be formed.	Easy2	MathImplementation	No attempts yet	1s	512 MB	Judgeable
Calendar of Alpha CentauriGiven a calendar with m months of d days each and a w-day week labeled a to the w-th letter, find the weekday letter for day i of month j in year k.	Easy2	MathImplementation	No attempts yet	1s	512 MB	Judgeable
Binary Game 2Given n, print the binary digits of every number from 0 to n in order, concatenated into one digit sequence.	Easy2	ImplementationMath	No attempts yet	1s	512 MB	Judgeable
PatchworkGiven an R by C quilt and a sequence of patch placements, print the final grid after each patch is stamped on and clipped at the edges.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Trip OdometerGiven N trip distances, find every distinct total that remains after removing exactly one distance from the list, sorted in ascending order.	Easy2	ArraySorting	No attempts yet	1s	1024 MB	Judgeable
Time and DateGiven x and y, check whether they form a valid 24-hour time (x hours y minutes) and a valid month and day date (x month y day).	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
August14 Beginner ContestGiven N problem IDs, print E, H, or VH for each one based on whether the user solved, attempted, or never touched it. Input and output handling is the main work.	Easy2	ImplementationHash map	No attempts yet	1s	1024 MB	Judgeable
Organizing SWERCFor each test, take the most beautiful problem at each difficulty 1 to 10 and sum the beauty, or print MOREPROBLEMS if one is missing.	Easy2	ArrayImplementation	No attempts yet	2s	2048 MB	Judgeable
Punched CardsGiven R and C, print an ASCII punched card with R rows and C columns, where each cell is a period inside a border of dashes, pipes, and plus signs.	Easy2	ImplementationString	No attempts yet	5s	1024 MB	Judgeable
KHLGiven N game results with period, overtime, and shootout scores, compute the total points Medveščak earns across all games.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
TiMGiven the characters of an alternating X or number and +/- expression, output the digit sum, the sum of the numbers, and the X value that makes it zero.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Ari's Clever Portal TripSimulate Ari's zigzag walk from row 1 to the portal at (N, M) and report whether the path passes through the minion cell (Sr, Sc).	Easy2	SimulationImplementation	No attempts yet	1s	512 MB	Judgeable
두~~부 두부 두부Given N players in a circle, caller M, and called mo count K, output the number of the player whose mo count is K, who takes the next turn.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Searching for Sogang's HistoryGiven current and freshman-era facility scores for campus places, find the largest increase in total score from restoring at most one place.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
One Shot at LifeDecide whether a string of uppercase letters has a run of 5 or more characters where each adjacent pair is alphabetically consecutive.	Easy2	StringSimulation	No attempts yet	1s	1024 MB	Judgeable
Cake slicesGiven up to 10 cake slices, where slice i is 1/c_i of a cake, count the subsets whose total size is between 99/100 and 101/100 of a cake.	Easy2	Brute forceMath	No attempts yet	1s	1024 MB	Judgeable
Gahee and Ignoring Defense RateGiven a monster's defense rate a and the user's ignore defense b (in percent), print 1 if the remaining defense rate is under 100, otherwise print 0.	Easy2	MathImplementation	No attempts yet	1s	512 MB	Judgeable
Military Service ExaminationGiven each person's height and weight, print the military service grade (1 to 6) from a table that uses height ranges and BMI.	Easy2	Implementation	No attempts yet	2s	1024 MB	Judgeable
November 11For each year and month, find the date that is m days before month m, day m of that year, using the calendar with leap-year rules.	Easy2	ImplementationSimulation	No attempts yet	2s	1024 MB	Judgeable
CutlineGiven N student scores, find the k-th highest score, which is the lowest score among the top k students.	Easy2	SortingArray	No attempts yet	1s	1024 MB	Judgeable
Coding Is a Physical Education SubjectGiven N, a multiple of 4, print the C++ integer type name with N/4 copies of "long" followed by "int" that can store up to N bytes.	Easy2	StringImplementation	No attempts yet	0.5s	1024 MB	Judgeable
Measuring Student PopularityGiven n student names and each student's list of liked classmates, count how many students like each name and print the names sorted by count descending, then by name ascending.	Easy2	Hash mapSorting+1	No attempts yet	1s	512 MB	Judgeable
Multi-Field Preference Survey (Small)Given n student preference triples and m queries with wildcards, count the students matching each query's subject, fruit, and color.	Easy2	ImplementationBrute force	No attempts yet	1s	512 MB	Judgeable
A Very Simple ProblemFor each query with positive integers a and b, decide whether positive integers x and y exist with gcd(x, y) = a and x + y = b.	Easy2	MathNumber theory	No attempts yet	1s	1024 MB	Judgeable
BreadGiven each shop's travel time A and the bread's arrival time B, find the earliest time you can buy a loaf, or -1 if no shop works.	Easy2	ImplementationBrute force	No attempts yet	1s	1024 MB	Judgeable
Simple Problem (Small)Count tuples (x, y, z) within the bounds 1 to a, 1 to b, and 1 to c where x mod y, y mod z, and z mod x are all equal.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
AirPodsSimulate the AirPods battery use across N phone connections, doubling the cost on a repeat connection and resetting at 100 percent, then print the current level.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Linked Master ImsCount the skills that fire normally, where each R or K pairs with an earlier unused L or S, and an unmatched main skill breaks all later skills.	Easy2	StringSimulation	No attempts yet	1s	1024 MB	Judgeable
Counting Peaks of InfectionCount the peaks in each dataset of daily positive case counts, where a peak is a day with more cases than both the day before and the day after.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
NavigationGiven N routes that pass through ordered intermediate points, find the route number with the smallest total Manhattan distance from start to end.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
Puang and JongyunGiven two two-digit numbers, compute their product with the Vedic method, printing the intermediate values a, b, c, d, q, r and the product's two halves.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Shuttle BusGiven the one-way trip time x and the bus's arrival time y at Engineering Building 2, find the minimum minutes to wait for the bus at the station.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Making HamburgersGiven A buns and B patties, find the maximum number of hamburgers, where each hamburger uses two buns and one patty.	Easy2	MathImplementation	No attempts yet	1s	512 MB	Judgeable
Odd-Even SequenceDecide whether the sequence can be rearranged so odd positions hold sorted odd values and even positions hold sorted even values.	Easy2	SortingImplementation	No attempts yet	1s	512 MB	Judgeable
Palindrome Sotteok-SotteokGiven a string of 's' and 't', find the minimum number of single-character changes needed to make it a palindrome.	Easy2	StringTwo pointers	No attempts yet	1s	512 MB	Judgeable
Attendance EventGiven stamps collected and an item price, the task is to find the minimum payment using at most one coupon whose tier the stamp count unlocks.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Computation - Task 1Given real numbers a and b, write an instruction program that prints -2a-2b using input, addition, negation, and shift operations.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Computation - Task 5Read 32 bits a_1 to a_32 (most significant first) and print their value in base 10 using only the given instructions.	Easy2	Bit manipulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Mirror ReflectionGiven an N by N digit grid and a flip direction (L, R, U, or D), print the grid as a mirror would show it, with ? for digits that have no readable flipped form.	Easy2	MatrixImplementation	No attempts yet	1s	512 MB	Judgeable
Minigames with ImsCount the distinct names, then divide by the other players each game needs: 1 for Yut Nori, 2 for Find the Same Picture, 3 for One Card.	Easy2	Hash mapMath	No attempts yet	1s	512 MB	Judgeable
Number MaximizationGiven an integer of up to six digits, rearrange its digits to form the largest number possible.	Easy2	SortingString	No attempts yet	1s	1024 MB	Judgeable
Easy-to-Pronounce WordsGiven a lowercase word, print 1 if its vowels and consonants strictly alternate, and 0 otherwise.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Decimal XORGiven two integers up to 999,999, compute their digit-wise DEXOR, where each digit pair gives 0 if both digits are at most 2 or both are at least 7, otherwise 9.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Odd/Even StringsGiven a lowercase string, decide whether every letter appears an even number of times, every letter an odd number of times, or neither.	Easy2	StringHash map	No attempts yet	1s	1024 MB	Judgeable
Changing StringsGiven an uppercase string, replace characters outside the leftmost U to rightmost F span with hyphens and those inside with C.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Cat's AgeGiven a cat's age in years and months, convert it to human age in years and months using the 15, 9, and 4 rule.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Presidential ElectionGiven each state's electoral votes and both candidates' vote counts, decide who wins the popular vote and who wins the electoral vote.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
Digit CountGiven a range of 4-digit integers and a digit from 0 to 9, count how many times that digit appears across all numbers in the range.	Easy2	ImplementationBrute force	No attempts yet	1s	1024 MB	Judgeable
Judging Assistant for ContestGiven a submission's filename, return code, timing, and output, print one of five verdicts for it.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
A Game Called MindGiven each player's sorted cards, print the player letter for every card in ascending order of card value.	Easy2	SortingArray	No attempts yet	1s	1024 MB	Judgeable
Parity of StringsGiven a lowercase string, decide whether every letter appears an even number of times, every letter appears an odd number of times, or neither.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
SGA PresidentGiven n first names, count ordered pairs of names with different spellings that start with the same letter.	Easy2	Hash mapString+1	No attempts yet	1s	1024 MB	Judgeable
Simplified KeyboardGiven two lowercase words, decide whether they are identical, similar (same length, each letter matches or is a keyboard neighbor), or different.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Hi Cleopatra, the Best Potato Chip in the WorldGiven each player's maximum pitch, simulate the circle where the pitch rises by 1 per turn and find the first player whose maximum is exceeded.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Polar Bear Tears BracketsGiven a bracket string S of length N, find the fewest days Hyeop needs to build it by inserting O or X each night, or print -1 if it cannot be built.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Find the TwinsFor each set of 10 distinct jersey numbers, report whether 18 (Mack), 17 (Zack), both, or neither appears in the set.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
Brownies vs. Candies vs. CookiesFor each practice, double the brownie count whenever a group is at least as large as the remaining brownies, then print the count left after each group takes one.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Is the APC sorted from easy to hard?Given N distinct difficulty labels, check whether two problems were swapped, then print OK or KO with the two swapped difficulties in easy-to-hard order.	Easy2	ArrayImplementation	No attempts yet	1s	512 MB	Judgeable
Mission DonationFor each game, add up each mission's payout (K per kill, minus D per death, plus A per assist), skipping negative missions, and print the total.	Easy2	ImplementationMath	No attempts yet	1s	512 MB	Judgeable
Fastest FunctionGiven foo's percentage of total running time before and after an optimisation, output the factor by which foo itself got faster.	Easy2	MathImplementation	No attempts yet	1s	2048 MB	Judgeable
HI-ARCGiven a string of uppercase letters, find how many complete sets of H, I, A, R, and C can be taken to make HI-ARC emojis.	Easy2	StringImplementation	No attempts yet	1s	1024 MB	Judgeable
Similar Phone NumbersCount the space-separated phone numbers in A that start with B and are not equal to B.	Easy2	StringImplementation	No attempts yet	1s	512 MB	Judgeable
Big YieldGiven the total milk L and the pouring time T, find the difference between the two buckets' amounts, where the longer pour equals the larger bucket.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable