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Total results2,365 problems

Blueberry Waffle
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Fading Wind
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Hunt the Wumpus
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Suspicious Event
Easy2
Simulation, Hash map
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Splitology
Easy2
String, Brute force
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Queue skipping (Easy)
Easy2
Array, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Vestigium
Easy2
Array, Implementation
No attempts yet
Time limit
20s
Memory limit
1024 MB
Judgeable
Gahui and Soongsil University Station
Easy2
Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Special Small Fountain
Easy2
Implementation, Bit manipulation+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Encrypted School Name
Easy2
Implementation, Brute force+1
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Kalendar
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
SciComLove (2023)
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Table Tennis Match
Easy2
Simulation, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Clothes Hangers
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
256 MB
Judgeable
Shooting Bet
Easy2
Bit manipulation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Orange Eaten Long Ago
Easy2
Brute force, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Quattro Cheese Pizza
Easy2
String, Hash map+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cube pile
Easy2
Implementation, Array
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Ribbon (Easy)
Easy2
Brute force, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
2D Coordinate Conversion
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
512 MB
Judgeable
Daily Trips
Easy2
Simulation, Implementation
No attempts yet
Time limit
0.1s
Memory limit
1024 MB
Judgeable
Lemon Picking
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Junseok's Candy Shopping
Easy2
Greedy, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Bishoujo Computer Parubitto-chan
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Naming the Team
Easy2
Implementation, Sorting+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Since 1973
Easy2
Implementation, Brute force+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Cream Bread
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Final Price
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Flower Festival
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
The Informatics Teacher's Ambition
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Hungry (Easy)
Easy2
Bit manipulation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Three-Tier Chocolate Ice Cream
Easy2
Implementation, String+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Stack 2
Easy2
Stack, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Deque 2
Easy2
Queue, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Gift
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Special Event
Easy2
Array, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
in-out? out-in? stairs? reverse?
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
10!
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Egypt
Easy2
Implementation, Simulation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Skateboard
Easy2
Implementation, Sorting
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Word Chain
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Colorful Parrots
Easy2
Implementation, Sorting+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Gift Expiration Date
Easy2
Implementation, String
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Union Maplestory
Easy2
Sorting, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Potato
Easy2
Sorting, Greedy
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Slip~Hit! Hit~Slip!
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Planets of Two Dimensions
Easy2
Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Frankenstein and the Flasks
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Piltover and Zaun
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Marathoner
Easy2
Implementation, String
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Contest Results
Easy2
Implementation, Array
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Super Lucky Tickets (Basic)
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Japanese Crossword
Easy2
Implementation, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Lunch Break
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Yoda and SI Prefixes
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
How to Feed the Dragon
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Kingsman Player
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Drops
Easy2
Implementation, Array
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Marmalade Recipe
Easy2
Prefix sum, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Gravity Falls Diary
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Doctor Strange and the Swap
Easy2
Implementation, Brute force+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Journey Through Worlds
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Amulet Split
Easy2
Math, Geometry
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Final Grade
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Immersion into the Animus
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Spaceship
Easy2
Array, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Figurines
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Lucky Tickets
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
BB-8 Repair
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Almost Favorite Numbers
Easy2
Math, Implementation
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Just Laughter
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Basketball
Easy2
Hash map, Implementation+1
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Time to Rest
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Guards
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Non-Prime 2
Easy2
Implementation, Math
No attempts yet
Time limit
0.5s
Memory limit
1024 MB
Judgeable
Date
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Vampire Power
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Antelope Gnu
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Odin
Easy2
String, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
The Case of the Game
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Filter
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Alex and the Steak
Easy2
Implementation, Math
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Football
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Zakat
Easy2
Array, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Distributing the Rings of Power
Easy2
Greedy
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Treasure Map
Easy2
Math, Implementation
No attempts yet
Time limit
1s
Memory limit
1024 MB
Judgeable
Squad
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Clone War
Easy2
Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Yoda's Speechwriter
Easy2
String, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Harry Potter and Voldemort's Nose
Easy2
Implementation, Matrix
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Train
Easy2
Implementation, Brute force
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Chess
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
House Plates
Easy2
Implementation, Math
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Shop
Easy2
Implementation, Array
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Chemistry
Easy2
String, Implementation+1
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Gasoline Production
Easy2
Math, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Chess
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Royal Garden
Easy2
Brute force, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Strange Grasshopper
Easy2
Simulation, Implementation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable
Chess
Easy2
Implementation, Simulation
No attempts yet
Time limit
2s
Memory limit
1024 MB
Judgeable

Title	Level	Topics	Solved	Time limit	Memory limit	Judge
Blueberry WaffleGiven a pan that turns 180 degrees every r seconds and stops after f seconds, decide if the blueberry side faces up once the pan levels out.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
Fading WindSimulate a paper airplane's height and velocity under a fading wind and output the total horizontal distance it travels.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Hunt the WumpusGiven a seeded generator that places four wumpuses on a 10x10 grid, report each guess's hit status and the Manhattan distance to the nearest remaining wumpus.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Suspicious EventCount the logout events whose user has not logged in earlier in a sequence of login and logout records.	Easy2	SimulationHash map	No attempts yet	1s	1024 MB	Judgeable
SplitologyGiven a lowercase string of length up to 500, find a split into two non-empty palindromes, or report NO if none exists.	Easy2	StringBrute force	No attempts yet	1s	1024 MB	Judgeable
Queue skipping (Easy)Given the order in which people move to the front of a queue, find the person who is last in line after all moves.	Easy2	ArraySimulation	No attempts yet	2s	1024 MB	Judgeable
VestigiumGiven an N by N matrix with values from 1 to N, find its trace and count the rows and columns that contain a repeated value.	Easy2	ArrayImplementation	No attempts yet	20s	1024 MB	Judgeable
Gahui and Soongsil University StationSum the vertical drop in cm from the exit to the B6 platform, using stairs at 17cm each and escalator steps at 21cm each.	Easy2	Implementation	No attempts yet	1s	1024 MB	Judgeable
Special Small FountainGiven x0 and N, apply the rule that maps x to floor(x/2) XOR 6 when x is even or 2x XOR 6 when x is odd, N times, and print the result.	Easy2	ImplementationBit manipulation+1	No attempts yet	1s	512 MB	Judgeable
Encrypted School NameGiven an encrypted school name, find which of four schools it came from by trying all 26 possible shifts of its processed name.	Easy2	ImplementationBrute force+1	No attempts yet	1s	512 MB	Judgeable
KalendarGiven the day count n and the starting weekday d, the task prints a 7-column month calendar framed with '+', '-', and '\|' characters.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
SciComLove (2023)Given the prefix of length N of the repeated string SciComLove, flip the case of one character per query and print the uppercase count after each query.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
Table Tennis MatchGiven the predicted winner of each of N rounds, simulate the table tennis match and print the final score, which stops early once one player leads by 2 points.	Easy2	SimulationImplementation	No attempts yet	1s	1024 MB	Judgeable
Clothes HangersGiven each hanger's type and the counts of tops and bottoms, decide whether all clothes can be hung and print one valid assignment if so.	Easy2	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
Shooting BetGiven the shoot totals of A and B, find C's total, which is the bitwise XOR of the two scores.	Easy2	Bit manipulationMath	No attempts yet	1s	1024 MB	Judgeable
Orange Eaten Long AgoGiven a string, decide whether some length L makes the prefix of length L and the suffix of length L differ in exactly one position.	Easy2	Brute forceString	No attempts yet	1s	1024 MB	Judgeable
Quattro Cheese PizzaCheck whether the toppings include at least four different ones whose names end with Cheese, counting case-sensitively.	Easy2	StringHash map+1	No attempts yet	1s	1024 MB	Judgeable
Cube pileCount the cubes whose six face-adjacent positions all contain cubes in an N by N by N grid.	Easy2	ImplementationArray	No attempts yet	1s	1024 MB	Judgeable
Ribbon (Easy)Given N ribbons with positions, lengths, and colors, find two ribbons of different colors that can be tied together, or report NO.	Easy2	Brute forceImplementation	No attempts yet	1s	1024 MB	Judgeable
2D Coordinate ConversionFor each test case, convert a point between Cartesian (x, y) and polar (r, theta) coordinates, with theta in the range [0, 2pi).	Easy2	MathImplementation	No attempts yet	1s	512 MB	Judgeable
Daily TripsSimulate Bella's umbrella rule over N days and output, for each of the 2N bus trips, whether she carries an umbrella.	Easy2	SimulationImplementation	No attempts yet	0.1s	1024 MB	Judgeable
Lemon PickingSeongwoo picks lemons from one tree and walks home, losing one lemon per move. Find the maximum number of lemons he can carry home.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Junseok's Candy ShoppingGiven N bags of candy, find the largest even total you can get by choosing any subset of bags, or 0 if none exists.	Easy2	GreedyMath	No attempts yet	1s	1024 MB	Judgeable
Bishoujo Computer Parubitto-chanGiven an octal expression A+B, A-B, A*B, or A/B, print the result in octal, using floor division, or print invalid when it cannot be computed.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Naming the TeamGiven three members' solved counts, admission years, and surnames, print a name from the years mod 100 sorted ascending and another from surname initials sorted by solved count.	Easy2	ImplementationSorting+1	No attempts yet	2s	1024 MB	Judgeable
Since 1973Numbers are counted from 1, with any number containing 50 counted twice. Find the position where N first appears in this sequence.	Easy2	ImplementationBrute force+1	No attempts yet	1s	1024 MB	Judgeable
Cream BreadCount the groups of K consecutive loaves where the number of loaves without cream (0) is fewer than P.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
Final PriceGiven an initial price and the daily price change over a period, compute the price of a good at the end of that period.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
Flower FestivalGiven each car's position and constant speed on a road of length f, find the number of the car that reaches the end first.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
The Informatics Teacher's AmbitionPick two of the five weekdays so that the most students can attend both lecture days, then print that count and the chosen schedule.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
Hungry (Easy)For each positive integer m, print the pair x and y (x <= y) where 2^x + 2^y = m.	Easy2	Bit manipulationMath	No attempts yet	1s	1024 MB	Judgeable
Three-Tier Chocolate Ice CreamGiven uppercase strings, decide whether each one matches one of four three-part patterns built from a prefix of length ceil(n/3) and its reverse.	Easy2	ImplementationString+1	No attempts yet	1s	1024 MB	Judgeable
Stack 2Process N stack commands that push integers, pop or peek the top value, report the size, and check emptiness, printing -1 when the stack is empty.	Easy2	StackImplementation	No attempts yet	2s	1024 MB	Judgeable
Deque 2The task is to implement a deque with eight command types (push front/back, pop front/back, size, empty, front, back) and print results for queries.	Easy2	QueueSimulation	No attempts yet	2s	1024 MB	Judgeable
GiftGiven the daily sock prices, find the minimum cost to buy X socks on each of two consecutive days, 2X socks in total.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
Special EventFor each of five days, count how many people can attend, then print the day or days with the highest count, comma-separated on ties.	Easy2	ArrayImplementation	No attempts yet	1s	1024 MB	Judgeable
in-out? out-in? stairs? reverse?Given a string that is a permutation of the eight keys a s d f j k l ;, decide whether it is in-out, out-in, stairs, reverse, or none of these.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
10!Given N from 10 to 17, print how many weeks N! seconds equals, using 6 weeks as 3628800 seconds.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
EgyptStarting from P, follow the connected chain of x cells in a grid and print the direction of each move (gore, dolje, lijevo, desno), one per line.	Easy2	ImplementationSimulation	No attempts yet	1s	1024 MB	Judgeable
SkateboardGiven each athlete's two run scores and five trick scores, find the highest final score, where each final score is the best run plus the top two tricks.	Easy2	ImplementationSorting	No attempts yet	1s	1024 MB	Judgeable
Word ChainGiven a word chain record with one hidden word and a list of candidates, find the candidate that makes the chain valid with no repeated words.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
Colorful ParrotsGiven the body and tail colors of two parrots, list every distinct body and tail color pair a chick can have, sorted in dictionary order.	Easy2	ImplementationSorting+1	No attempts yet	1s	1024 MB	Judgeable
Gift Expiration DateCount how many gift cards have an expiration date later than the current date, with dates in YYYY-MM-DD form and no leap years.	Easy2	ImplementationString	No attempts yet	1s	1024 MB	Judgeable
Union MaplestoryGiven each character's level, sum the levels of the top 42 characters by level and the stat gains from reaching levels 60, 100, 140, 200, and 250.	Easy2	SortingImplementation	No attempts yet	1s	1024 MB	Judgeable
PotatoPark and Sungwoo take turns grabbing whole plates of fries, Park first, and the task is to find each player's total under optimal play.	Easy2	SortingGreedy	No attempts yet	1s	1024 MB	Judgeable
Slip~Hit! Hit~Slip!Given N moves with attack and dodge gains and real multipliers K_i, find the maximum final adrenaline when every move starts with the same action type.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Planets of Two DimensionsGiven n planets in dimension X and m in dimension Y, find the longest trip that visits no planet twice and never visits two same-dimension planets in a row.	Easy2	Math	No attempts yet	1s	1024 MB	Judgeable
Frankenstein and the FlasksGiven the classes of two reagents (N, Z, Q, R) and an operation (+, -, *), find the smallest class that contains every possible result.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
Piltover and ZaunGiven current statuses x1 and x2 and n years, decide whether Piltover gaining and Zaun losing the same yearly amounts can produce them.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
MarathonerSum n song durations given as mm:ss and print the total run length in hh:mm:ss format.	Easy2	ImplementationString	No attempts yet	2s	1024 MB	Judgeable
Contest ResultsGiven ICPC-style submissions, count solved problems and total penalty, where each non-CE wrong try before an OK adds 20 minutes.	Easy2	ImplementationArray	No attempts yet	2s	1024 MB	Judgeable
Super Lucky Tickets (Basic)Count the digit tickets of length n where the first half and second half have equal digit sums, and even-position and odd-position digit sums are also equal.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
Japanese CrosswordGiven a black and white picture, the task is to print the run lengths of black cells for each row and each column.	Easy2	ImplementationSimulation	No attempts yet	2s	1024 MB	Judgeable
Lunch BreakFor each restaurant, add the distance from the hideout, the eating time, and the distance to the destination, then output the smallest total.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Yoda and SI PrefixesGiven a word of stacked SI prefixes followed by meter, meter^2, or meter^3, output the power of ten x that the unit equals in base SI units.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
How to Feed the DragonGiven the feeding times for today and tomorrow, print the gap between them as HH:MM, with equal times giving 24:00.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Kingsman PlayerGiven a permutation of song numbers, decide whether it follows cyclic sequential order, and if not, output the first position that breaks the pattern.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
DropsCount the drops whose period is at most both the cleaning period k and the time limit t, since only those fall before the next reset.	Easy2	ImplementationArray	No attempts yet	2s	1024 MB	Judgeable
Marmalade RecipeGiven cumulative counts b_i of values at most i, rebuild the sorted array a of n integers from 1 to m.	Easy2	Prefix sumImplementation	No attempts yet	2s	1024 MB	Judgeable
Gravity Falls DiaryGiven page size, letter size, and letter count, find how many pages the diary needs, or -1 if no letter fits on a page.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Doctor Strange and the SwapFind two positions whose swap puts even numbers on even positions and odd numbers on odd positions, or report -1 -1 if no swap works.	Easy2	ImplementationBrute force+1	No attempts yet	2s	1024 MB	Judgeable
Journey Through WorldsCount the repdigit numbers (such as 11, 222, or 9999) between l and r, where l and r can be as large as 10^18.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Amulet SplitGiven a right triangle with legs X and Y on the axes, find the vertical line x that splits its area into two equal halves.	Easy2	MathGeometry	No attempts yet	2s	1024 MB	Judgeable
Final GradeGiven a string of letter grades (A is best, Z worst), output the mean rounded in the student's favor, capped at one step better than the worst grade.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Immersion into the AnimusGiven n and k, count the unordered pairs of distinct natural numbers, each at most n, that sum to k.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
SpaceshipGiven n enemy strengths, find the boss, which equals the sum of the others, and print the order that destroys it last.	Easy2	ArrayMath	No attempts yet	2s	1024 MB	Judgeable
FigurinesGiven n figurines each facing N, S, W, or E, find the fewest turns needed to make all of them face the same direction.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Lucky TicketsCount the tickets with all-equal digits in the range from N-M to N, where N is Dim Dimych's ticket and M is the number of earlier passengers.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
BB-8 RepairGiven a plate of height a and width b and a hole of height h and width w, find the fewest plates needed to cover the hole.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
Almost Favorite NumbersCount the integers from 1 to m whose decimal representation ends with the digits of n.	Easy2	MathImplementation	No attempts yet	0.5s	1024 MB	Judgeable
Just LaughterFind the length of the longest substring made of alternating letters a and h in a string of up to 100,000 lowercase letters.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
BasketballGiven a log of score changes in two hoops, find the player who scored the most points and report that total.	Easy2	Hash mapImplementation+1	No attempts yet	1s	1024 MB	Judgeable
Time to RestGiven n penguin groups with start a_i, step b_i, and size c_i, find the total count of penguins whose path passes through point k.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
GuardsCount the guards in an n by m grid whose Manhattan distance to the ship at (x, y) is at most k, excluding the ship's own cell.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
Non-Prime 2Given a prime k with 0 < k < 1 and up to eight decimal digits, output a fraction p/q with p and q at most 10^9 that approximates k.	Easy2	ImplementationMath	No attempts yet	0.5s	1024 MB	Judgeable
DateGiven a meal cost k and Edward's bills, decide whether the sum still reaches k after removing the largest bill.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
Vampire PowerEdward picks a sign for each vampire's power so that only the total is revealed, and the task is to query and output the answer in an interactive protocol.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Antelope GnuGiven a start and a target intersection in a grid of streets, count the turns needed when the car may only turn left or make U-turns.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
OdinGiven a bracketed formula, the task rewrites first-level brackets as curly braces, second-level as square brackets, and deeper ones as round brackets.	Easy2	StringSimulation	No attempts yet	2s	1024 MB	Judgeable
The Case of the GameTrack the ammo count through save, load, shoot, and ammo actions, and print the count after each action.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
FilterSimulate n daily oil pours into a filter of capacity r that drains x liters per day, and find the total oil that flows out.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
Alex and the SteakGiven k presses of a microwave button, where each group of five presses adds 30, 60, 90 and so on seconds per press, find the total heating time.	Easy2	ImplementationMath	No attempts yet	1s	1024 MB	Judgeable
FootballFor each first-leg score a:b, count the second-leg results where LAG wins and where DCU wins, by total goals and then away goals.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
ZakatGiven each player's demanded salary, surname, and citizenship, find the surname of the Russian player with the highest salary.	Easy2	ArrayImplementation	No attempts yet	2s	1024 MB	Judgeable
Distributing the Rings of PowerGiven sizes of ring groups, find the fewest rings that must be handed out one by one until only one group remains.	Easy2	Greedy	No attempts yet	2s	1024 MB	Judgeable
Treasure MapEach clue bounds the treasure with a strict inequality, so count the lattice points inside the resulting rectangle, or print Infinity if some side is open.	Easy2	MathImplementation	No attempts yet	1s	1024 MB	Judgeable
SquadGiven two equal-length digit strings a and b, print the string that takes the larger digit at each position.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Clone WarCount the pairs of clones whose coordinates have different parity, since the required distances force each side to match the parity of its coordinates.	Easy2	Math	No attempts yet	2s	1024 MB	Judgeable
Yoda's SpeechwriterReverse the word order in each period-terminated sentence of a line of lowercase words, keeping the periods and single spaces.	Easy2	StringImplementation	No attempts yet	2s	1024 MB	Judgeable
Harry Potter and Voldemort's NoseCount the pairs of horizontally or vertically adjacent free cells in an n by m grid, where each pair can hold the nose.	Easy2	ImplementationMatrix	No attempts yet	2s	1024 MB	Judgeable
TrainGiven the surviving berths of a 54-berth sleeping car, choose two free berths in the closest compartments, preferring non-side berths and then more lower berths.	Easy2	ImplementationBrute force	No attempts yet	2s	1024 MB	Judgeable
ChessTigra moves two squares straight or one square diagonally on an 8x8 board; decide whether it can reach the Slonopotam's square.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
House PlatesGiven house numbers on each street, find the total cost of plates when each binary 0 digit costs a rubles and each binary 1 digit costs b rubles.	Easy2	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
ShopGiven a product price and a percent range, find the cheapest candidate gift whose price falls between a and b percent of that price.	Easy2	ImplementationArray	No attempts yet	2s	1024 MB	Judgeable
ChemistryGiven a chemical formula with C, H, N, O and counts, the task is to print the total molar mass using fixed atomic weights.	Easy2	StringImplementation+1	No attempts yet	2s	1024 MB	Judgeable
Gasoline ProductionGiven n bids with line cost A, per-ton cost B, and price C, find the bid index that minimizes A/(C-B), with ties going to the smallest index.	Easy2	MathImplementation	No attempts yet	2s	1024 MB	Judgeable
ChessGiven a chess position and a list of moves, output the letter of the piece that makes each move in order.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
Royal GardenGiven an a by b grid of letters, decide whether deleting one full row or column leaves only cells with the same letter.	Easy2	Brute forceImplementation	No attempts yet	2s	1024 MB	Judgeable
Strange GrasshopperStarting at stone 1, the grasshopper jumps k stones from stone k across a row with destroyed stones. Decide whether it reaches the last stone.	Easy2	SimulationImplementation	No attempts yet	2s	1024 MB	Judgeable
ChessGiven a path of squares a single chess piece visited, list every piece (including white and black pawns) that could have traveled it by its legal moves.	Easy2	ImplementationSimulation	No attempts yet	2s	1024 MB	Judgeable