Math and counting

Number theory, combinatorics, and geometry

Under construction

Still being built. Things may change

Total results12,037 problems

Escape from a RectangleEasy1
Math, Geometry +1No attempts yetTime limit2sMemory limit128 MB
Judgeable
HexadecimalEasy1
Math, ImplementationNo attempts yetTime limit2sMemory limit128 MB
Judgeable
Cutting ChocolateEasy1
Math, ImplementationNo attempts yetTime limit2sMemory limit128 MB
Judgeable
Safari WorldEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Verification DigitEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Oven ClockEasy1
Math, SimulationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Sum of Two Numbers - 2Easy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Average and MedianEasy1
Sorting, Array +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
MultiplicationEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Least Common Multiple and Greatest Common DivisorEasy1
Math, Number theoryNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Fibonacci NumberEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Leap YearEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
After the PartyEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Alarm ClockEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
SangsuEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Find R2Easy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Taxicab GeometryEasy1
Math, Geometry +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
SharesEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
The Navi-Computer is Down!Easy1
Math, Implementation +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
Speed LimitEasy1
Implementation, Math +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
LunacyEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Spinner Lock SimulationEasy1
Simulation, Implementation +2No attempts yetTime limit1sMemory limit128 MB
Judgeable
TGN Advertising DecisionEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Triangle and Its Three SidesEasy1
Implementation, Math +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
Divisors and MultiplesEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Sarah's ToysEasy1
Math, Implementation +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
PyramidsEasy1
Math, Implementation +2No attempts yetTime limit1sMemory limit128 MB
Judgeable
Battle Droid PriceEasy1
Math, Implementation +2No attempts yetTime limit1sMemory limit128 MB
Judgeable
SanggeunaldEasy1
Implementation, Math +2No attempts yetTime limit1sMemory limit128 MB
Judgeable
The Errand RouteEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
ReceiptEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Exam ScoresEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Hot DogsEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Sanggeun's FriendsEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Which Alien?Easy1
Implementation, Brute force +1No attempts yetTime limit2sMemory limit512 MB
Judgeable
Roll the DiceEasy1
Math, Implementation +1No attempts yetTime limit1sMemory limit128 MB
Judgeable
AlienEasy1
Geometry, Implementation +2No attempts yetTime limit2sMemory limit128 MB
Judgeable
Can You Add This?Easy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
PlaneEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
SumEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
FactorialEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
LifeguardEasy1
Geometry, MathNo attempts yetTime limit1sMemory limit512 MB
Judgeable
Basketball PlayerEasy1
MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Sign of OperationEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
SticksEasy1
Math, GeometryNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Mountain ShelterEasy1
MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
StrollEasy1
Simulation, MathNo attempts yetTime limit2sMemory limit128 MB
Judgeable
Trial Task 2Easy1
MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
HeptathlonEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Pennant RaceEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Plot of LandEasy1
Geometry, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Grocery ShoppingEasy1
Brute force, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Ant EntrapmentEasy1
Implementation, MathNo attempts yetTime limit3sMemory limit256 MB
Judgeable
Math TutoringEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
How much?Easy1
Implementation, MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Find the missing pagesEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Kkung's Space TripEasy1
Math, ImplementationNo attempts yetTime limit2sMemory limit128 MB
Judgeable
Sahur and Imsa'Easy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Sum of Odd NumbersEasy1
MathNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Right TriangleEasy1
Math, SortingNo attempts yetTime limit1sMemory limit128 MB
Judgeable
Max VolumeEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
NICE check letterEasy1
Implementation, MathNo attempts yetTime limit2sMemory limit1024 MB
Judgeable
Filling in the missing rectangle valueEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit128 MB
Judgeable
SnacksEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Halloween CandyEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Coupon DiscountEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Ship SelectionEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Acid and BaseEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Golden Ratio TestEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
ACM HotelEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Mod ArithmeticEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Do you like fractions?Easy1
Implementation, MathNo attempts yetTime limit2sMemory limit256 MB
Judgeable
Subin and the SequenceEasy1
Prefix sum, MathNo attempts yetTime limit1sMemory limit32 MB
Judgeable
Mosquito TrapEasy1
GeometryNo attempts yetTime limit1sMemory limit32 MB
Judgeable
PolyhedronEasy1
MathNo attempts yetTime limit5sMemory limit256 MB
Judgeable
Kings of PersiaEasy1
MathNo attempts yetTime limit2sMemory limit256 MB
Judgeable
Water BillEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
ApplesEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
FactorialEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
N-orthotopeEasy1
Implementation, GeometryNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Comma-separated A+BEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Compute my GPAEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Namuk's Chicken CoopEasy1
MathNo attempts yetTime limit2sMemory limit256 MB
Judgeable
The Eccentric ProfessorEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Balancing WeightsEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Cookie LoverEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Hangul SyllablesEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Pedometer DistanceEasy1
Implementation, MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Covering an equilateral triangleEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Polynomial BoundariesEasy1
MathNo attempts yetTime limit2sMemory limit256 MB
Judgeable
Little JeongminEasy1
MathNo attempts yetTime limit1sMemory limit512 MB
Judgeable
Three Kinds of SumsEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Affine CipherEasy1
Implementation, String +1No attempts yetTime limit5sMemory limit256 MB
Judgeable
Box intersection volumeEasy1
MathNo attempts yetTime limit1sMemory limit256 MB
Judgeable
Moving FruitEasy1
MathNo attempts yetTime limit1sMemory limit32 MB
Judgeable
Fence PaintingEasy1
Intervals, MathNo attempts yetTime limit2sMemory limit512 MB
Judgeable
HicCupEasy1
Math, ImplementationNo attempts yetTime limit1sMemory limit32 MB
Judgeable
George BooleEasy1
Implementation, String +2No attempts yetTime limit2sMemory limit512 MB
Judgeable
Will floats still pass?Easy1
Implementation, GeometryNo attempts yetTime limit2sMemory limit512 MB
Judgeable
A debugging life that starts with std::sortEasy1
Implementation, Sorting +2No attempts yetTime limit2sMemory limit512 MB
Judgeable

Title	Level	Topics	Solved	Time limit	Memory limit	Judge
Escape from a RectangleGiven a point inside an axis-aligned rectangle, compute the minimum distance from the point to the nearest side of the rectangle.	Easy1	MathGeometry+1	No attempts yet	2s	128 MB	Judgeable
HexadecimalConvert a hexadecimal number of at most 6 digits into its decimal value and print it.	Easy1	MathImplementation	No attempts yet	2s	128 MB	Judgeable
Cutting ChocolateCompute the minimum number of straight cuts needed to divide an N by M chocolate bar into all 1x1 pieces.	Easy1	MathImplementation	No attempts yet	2s	128 MB	Judgeable
Safari WorldRead two integers and print the absolute value of their difference.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Verification DigitCompute the check digit as the sum of squares of five given digits, mod 10.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Oven ClockGiven a start time and a number of minutes to cook, compute and print the finishing time on a 24-hour clock.	Easy1	MathSimulation	No attempts yet	1s	128 MB	Judgeable
Sum of Two Numbers - 2Read two single-digit integers from separate lines and print their sum.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Average and MedianRead five natural numbers and print their average and median.	Easy1	SortingArray+1	No attempts yet	1s	128 MB	Judgeable
MultiplicationGiven two three-digit numbers, print the partial products from vertical multiplication and their total.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Least Common Multiple and Greatest Common DivisorFor multiple integer pairs, compute and print each pair's least common multiple and greatest common divisor.	Easy1	MathNumber theory	No attempts yet	1s	128 MB	Judgeable
Fibonacci NumberCompute the nth Fibonacci number for n up to 45.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Leap YearGiven a year, output 1 if it is a leap year according to the standard divisibility rule, otherwise output 0.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
After the PartyCompute actual attendees as L times P, then output the difference between each of five reported counts and that value.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Alarm ClockGiven an alarm time in hours and minutes, compute and print the time 45 minutes earlier, wrapping around midnight if needed.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
SangsuReverse two given three-digit numbers digit by digit and print the larger reversed value.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Find R2Given R1 and the average S of two integers, compute and print the other integer R2.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Taxicab GeometryGiven radius R, compute and print the area of a Euclidean circle and a taxicab-metric circle.	Easy1	MathGeometry+1	No attempts yet	1s	128 MB	Judgeable
SharesFor repeated pairs N and S, print the largest integer x such that N times x does not exceed S.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
The Navi-Computer is Down!Read pairs of 3D coordinates and system names, and print the Euclidean distance between each pair rounded to two decimals.	Easy1	MathImplementation+1	No attempts yet	1s	128 MB	Judgeable
Speed LimitGiven segments of constant speed with cumulative elapsed times, compute the total distance for each data set until n equals -1.	Easy1	ImplementationMath+1	No attempts yet	1s	128 MB	Judgeable
LunacyFor each non-negative Earth weight read until a negative sentinel, print a sentence giving the weight on the Moon at 0.167 times the Earth weight, both rounded to two decimals.	Easy1	ImplementationMath	No attempts yet	1s	128 MB	Judgeable
Spinner Lock SimulationGiven the starting digits of a spinner lock and a sequence of button labels, add each label's digits to the wheels modulo 10 and print the final readout.	Easy1	SimulationImplementation+2	No attempts yet	1s	128 MB	Judgeable
TGN Advertising DecisionFor each test case, compare the no-ad revenue r against e minus c, then print advertise, do not advertise, or does not matter.	Easy1	ImplementationMath	No attempts yet	1s	128 MB	Judgeable
Triangle and Its Three SidesRead triples of positive integers until 0 0 0, and for each print Equilateral, Isosceles, Scalene, or Invalid based on equal sides and the triangle inequality.	Easy1	ImplementationMath+1	No attempts yet	1s	128 MB	Judgeable
Divisors and MultiplesFor each pair of numbers, print factor if the first divides the second, multiple if the first is a multiple of the second, or neither.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Sarah's ToysFor each night, subtract the toys left around the house from the total, then report how many pairs and whether one group of 3 is formed.	Easy1	MathImplementation+1	No attempts yet	1s	128 MB	Judgeable
PyramidsFor each positive base size n until a terminating 0, print the total number of blocks in a pyramid whose layers count down from n to 1.	Easy1	MathImplementation+2	No attempts yet	1s	128 MB	Judgeable
Battle Droid PriceFor each test case, multiply five part quantities by fixed prices, sum them, and print the total with a dollar sign and two decimals.	Easy1	MathImplementation+2	No attempts yet	1s	128 MB	Judgeable
SanggeunaldGiven prices for three burgers and two drinks, print the lowest cost of one burger plus one drink minus a 50 won combo discount.	Easy1	ImplementationMath+2	No attempts yet	1s	128 MB	Judgeable
The Errand RouteAdd four travel times given in seconds and print the total split into minutes on the first line and seconds on the second.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
ReceiptGiven the total price of 10 books and the prices of 9 of them, find the missing book's price.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Exam ScoresGiven the four subject scores of two students, print the larger of the two totals, or Minguk's total when they tie.	Easy1	ImplementationMath	No attempts yet	1s	128 MB	Judgeable
Hot DogsRead pairs of integers H and P until end of file and print H/P rounded to exactly two decimal places.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Sanggeun's FriendsFor each test case, read the counts of male and female friends and print their sum; stop at the two zeros line.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Which Alien?Given the number of antennae and eyes a witness saw, print the names of all alien species whose ranges match, in the order given.	Easy1	ImplementationBrute force+1	No attempts yet	2s	512 MB	Judgeable
Roll the DiceCount ordered pairs (a, b) with a from 1 to m, b from 1 to n, and a + b = 10, then print the count with singular or plural wording.	Easy1	MathImplementation+1	No attempts yet	1s	128 MB	Judgeable
AlienGiven a point and n axis-aligned rectangles, decide whether any rectangle contains the point, boundaries included.	Easy1	GeometryImplementation+2	No attempts yet	2s	128 MB	Judgeable
Can You Add This?Read t pairs of integers and print the sum of each pair on its own line.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
PlaneGiven row and seat counts for business and economy classes, compute the total number of seats on the plane.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
SumGiven an integer n, compute and print the sum of all integers from 1 to n.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
FactorialRead n and print the ones digit of n factorial.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
LifeguardThe task is to count children farther than k meters from the lifeguard position.	Easy1	GeometryMath	No attempts yet	1s	512 MB	Judgeable
Basketball PlayerGiven current height k, required height w and growth m per hit, compute the fewest hits needed to reach w.	Easy1	Math	No attempts yet	1s	128 MB	Judgeable
Sign of OperationChoose the operator among +, -, and * that gives the largest value for a and b, and print the expression or NIE on a tie.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
SticksGiven three stick lengths, print 2 if they form an equilateral triangle, 1 if only a right triangle, and 0 otherwise.	Easy1	MathGeometry	No attempts yet	1s	128 MB	Judgeable
Mountain ShelterCompute the maximum number of dominoes that fit in a W by K grid for up to 10 test cases.	Easy1	Math	No attempts yet	1s	128 MB	Judgeable
StrollGiven a walk of N, S, E and W steps on a grid, compute the Manhattan distance from the endpoint back to the start.	Easy1	SimulationMath	No attempts yet	2s	128 MB	Judgeable
Trial Task 2Given n scored rounds plus one trial round with 2 to 3 problems each, print the smallest and largest possible total problem counts.	Easy1	Math	No attempts yet	1s	128 MB	Judgeable
HeptathlonThe program converts seven event records into scores with the given formulas and prints the total for each test case.	Easy1	ImplementationMath	No attempts yet	1s	128 MB	Judgeable
Pennant RacePrint the team with the highest winning percentage, computed as wins divided by wins plus losses plus ties.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Plot of LandGiven N bead positions, compute the area of the smallest axis-aligned rectangle that contains them all.	Easy1	GeometryImplementation	No attempts yet	1s	128 MB	Judgeable
Grocery ShoppingPick the crab stick bag with the highest grams per won, breaking ties by the lowest price.	Easy1	Brute forceMath	No attempts yet	1s	128 MB	Judgeable
Ant EntrapmentTrack the minimum and maximum X and Y over the ants and report the area and perimeter of that bounding rectangle.	Easy1	ImplementationMath	No attempts yet	3s	256 MB	Judgeable
Math TutoringRead each polynomial's degree and coefficients and print the coefficients of its derivative in the same format.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
How much?Add the base car price to each option's quantity times unit price for every test case.	Easy1	ImplementationMath	No attempts yet	1s	128 MB	Judgeable
Find the missing pagesGiven a booklet of N pages and a page P, print the other three pages on the same folded sheet in ascending order.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Kkung's Space TripCount the ships that reach the destination by checking whether each ship's fuel covers its burn rate over the travel time.	Easy1	MathImplementation	No attempts yet	2s	128 MB	Judgeable
Sahur and Imsa'Given T timestamps, print the time 45 minutes earlier for each, wrapping past midnight.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
Sum of Odd NumbersSum all odd integers from 1 to the given odd N for each test case.	Easy1	Math	No attempts yet	1s	128 MB	Judgeable
Right TriangleGiven three side lengths per test case in any order, decide whether they form a right triangle.	Easy1	MathSorting	No attempts yet	1s	128 MB	Judgeable
Max VolumeCompute the volume of each cone, cylinder, and sphere with pi as 3.14159 and print the largest value rounded to three decimals.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
NICE check letterRead seven digits, compute the weighted sum modulo 11, and print the mapped check letter.	Easy1	ImplementationMath	No attempts yet	2s	1024 MB	Judgeable
Filling in the missing rectangle valueEach line gives a rectangle's length, width and area with one value replaced by 0, and you compute and print the missing value.	Easy1	MathImplementation	No attempts yet	1s	128 MB	Judgeable
SnacksCompute K times N minus M, or zero when the money on hand covers the total snack price.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Halloween CandySplit c candies evenly among v siblings so each gets the same count and the father keeps the remainder.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Coupon DiscountApply a 20 percent coupon to each listed price and print the discounted price rounded to two decimals.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Ship SelectionCount the ships whose fuel covers consumption times the integer-division travel time for the given distance.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
Acid and BaseCompute the pH from each given H+ or OH- concentration with the log formulas and print it rounded to two decimals.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Golden Ratio TestGiven T pairs of numbers, print golden for each pair whose ratio a/b is within 1 percent of the golden ratio.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
ACM HotelGuests fill rooms column by column from the elevator with lower floors first, so print the room number of the Nth guest.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Mod ArithmeticGiven A, B and C, print (A+B)%C, ((A%C)+(B%C))%C, (AxB)%C and ((A%C)x(B%C))%C on four lines.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Do you like fractions?Convert each fraction to a mixed number by printing the quotient, the remainder, and the original denominator without reducing.	Easy1	ImplementationMath	No attempts yet	2s	256 MB	Judgeable
Subin and the SequenceGiven the prefix averages of a sequence, recover the original sequence term by term.	Easy1	Prefix sumMath	No attempts yet	1s	32 MB	Judgeable
Mosquito TrapFind the smallest area of an axis-aligned square that covers all given points on the table.	Easy1	Geometry	No attempts yet	1s	32 MB	Judgeable
PolyhedronFor each test case, compute the face count of a convex polyhedron from V and E with Euler formula F = 2 - V + E.	Easy1	Math	No attempts yet	5s	256 MB	Judgeable
Kings of PersiaGiven birth and death year ranges, compute the smallest and largest possible age for each king.	Easy1	Math	No attempts yet	2s	256 MB	Judgeable
Water BillCompute the bills of companies X and Y from the given usage and output the cheaper one.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
ApplesEach school splits its apples evenly among its students, and the program sums the leftover apples.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
FactorialPrint the factorial of a given integer N, where N is between 0 and 12.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
N-orthotopeGiven two axis-aligned boxes in N dimensions, print the dimension of their overlap, or -1 when they do not meet.	Easy1	ImplementationGeometry	No attempts yet	1s	256 MB	Judgeable
Comma-separated A+BAdd pairs of single-digit integers given as comma-separated values for each test case.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
Compute my GPACompute each semester total credits and credit-weighted GPA from course credits and grades, rounded to one decimal place.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Namuk's Chicken CoopFrom the total number of legs and chickens, find how many chickens lost a leg and how many are intact.	Easy1	Math	No attempts yet	2s	256 MB	Judgeable
The Eccentric ProfessorCompare n times s against d plus n times p for each test case and print which option costs less.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Balancing WeightsYou sum the signed positions of the weights and report whether the lever tips left, tips right, or stays balanced.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
Cookie LoverGiven N cookies and C eaten per day, compute how many days pass until none remain.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Hangul SyllablesGiven N between 1 and 11172, print the N-th Hangul syllable in initial, medial, then final order.	Easy1	MathImplementation	No attempts yet	1s	256 MB	Judgeable
Pedometer DistanceMultiply each step count by the stride length and print each distance in kilometres with five decimals.	Easy1	ImplementationMath	No attempts yet	1s	256 MB	Judgeable
Covering an equilateral triangleCover an equilateral triangle of side A with the smallest possible number of side-B equilateral triangles, which is (A/B) squared.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Polynomial BoundariesGiven polynomial coefficients and a point (x, y), evaluate the polynomial at x and report whether y lies below, on, or above its value.	Easy1	Math	No attempts yet	2s	256 MB	Judgeable
Little JeongminAdd three given integers up to 10^12 and print their sum.	Easy1	Math	No attempts yet	1s	512 MB	Judgeable
Three Kinds of SumsFor each data set with N, print the sums of the first N positive integers, the first N odd integers, and the first N even integers.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Affine CipherApply E(X) = (aX + b) mod 26 to each uppercase letter of the plaintext and print the ciphertext.	Easy1	ImplementationString+1	No attempts yet	5s	256 MB	Judgeable
Box intersection volumeCompute the volume shared by N axis-aligned boxes by intersecting their x, y, and z ranges.	Easy1	Math	No attempts yet	1s	256 MB	Judgeable
Moving FruitCompute the fewest single-fruit moves between two baskets so one holds only apples and the other holds only oranges.	Easy1	Math	No attempts yet	1s	32 MB	Judgeable
Fence PaintingCompute the total painted length covered by two given intervals on a number line.	Easy1	IntervalsMath	No attempts yet	2s	512 MB	Judgeable
HicCupGiven N, add 10N, 10N+10, and 20N+20, then print the total.	Easy1	MathImplementation	No attempts yet	1s	32 MB	Judgeable
George BooleRead one boolean operation in the form true AND false and print its result.	Easy1	ImplementationString+2	No attempts yet	2s	512 MB	Judgeable
Will floats still pass?Print a fixed two-point set, (0, 0) and (1, 1), with no input; the answer is a constant output.	Easy1	ImplementationGeometry	No attempts yet	2s	512 MB	Judgeable
A debugging life that starts with std::sortPrint N = 2 and the two points (1, 0) and (0, 1), a fixed counterexample for a broken comparator in std::sort.	Easy1	ImplementationSorting+2	No attempts yet	2s	512 MB	Judgeable