전체 글
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[codility] Prefix Sums - CountDivAlgorithm 2021. 9. 24. 02:29
문제 Write a function: public func solution(_ A : Int, _ B : Int, _ K : Int) -> Int that, given three integers A, B and K, returns the number of integers within the range [A..B] that are divisible by K, i.e.: { i : A ≤ i ≤ B, i mod K = 0 } For example, for A = 6, B = 11 and K = 2, your function should return 3, because there are three numbers divisible by 2 within the range [6..11], namely 6, 8 an..
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[codility] Prefix Sums - PassingCarsAlgorithm 2021. 9. 24. 02:04
문제 A non-empty array A consisting of N integers is given. The consecutive elements of array A represent consecutive cars on a road. Array A contains only 0s and/or 1s: 0 represents a car traveling east, 1 represents a car traveling west. The goal is to count passing cars. We say that a pair of cars (P, Q), where 0 ≤ P < Q < N, is passing when P is traveling to the east and Q is traveling to the ..
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[codility] Counting Elements - MissingIntegerAlgorithm 2021. 9. 24. 00:39
문제 This is a demo task. Write a function: public func solution(_ A : inout [Int]) -> Int that, given an array A of N integers, returns the smallest positive integer (greater than 0) that does not occur in A. For example, given A = [1, 3, 6, 4, 1, 2], the function should return 5. Given A = [1, 2, 3], the function should return 4. Given A = [−1, −3], the function should return 1. Write an efficie..
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[codility] Counting Elements - MaxCountersAlgorithm 2021. 9. 23. 23:41
문제 You are given N counters, initially set to 0, and you have two possible operations on them: increase(X) − counter X is increased by 1, max counter − all counters are set to the maximum value of any counter. A non-empty array A of M integers is given. This array represents consecutive operations: if A[K] = X, such that 1 ≤ X ≤ N, then operation K is increase(X), if A[K] = N + 1 then operation ..
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[codility] Counting Elements - PermCheckAlgorithm 2021. 9. 23. 20:53
문제 A non-empty array A consisting of N integers is given. A permutation is a sequence containing each element from 1 to N once, and only once. For example, array A such that: A[0] = 4 A[1] = 1 A[2] = 3 A[3] = 2 is a permutation, but array A such that: A[0] = 4 A[1] = 1 A[2] = 3 is not a permutation, because value 2 is missing. The goal is to check whether array A is a permutation. Write a functi..
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[codility] Counting Elements - FrogRiverOneAlgorithm 2021. 9. 23. 20:37
문제 A small frog wants to get to the other side of a river. The frog is initially located on one bank of the river (position 0) and wants to get to the opposite bank (position X+1). Leaves fall from a tree onto the surface of the river. You are given an array A consisting of N integers representing the falling leaves. A[K] represents the position where one leaf falls at time K, measured in second..
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[codility] Time Complexity - TapeEquilibriumAlgorithm 2021. 9. 23. 00:48
문제 A non-empty array A consisting of N integers is given. Array A represents numbers on a tape. Any integer P, such that 0 < P < N, splits this tape into two non-empty parts: A[0], A[1], ..., A[P − 1] and A[P], A[P + 1], ..., A[N − 1]. The difference between the two parts is the value of: |(A[0] + A[1] + ... + A[P − 1]) − (A[P] + A[P + 1] + ... + A[N − 1])| In other words, it is the absolute dif..
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[codility] Time Complexity- PermMissingElemAlgorithm 2021. 9. 22. 23:47
문제 An array A consisting of N different integers is given. The array contains integers in the range [1..(N + 1)], which means that exactly one element is missing. Your goal is to find that missing element. Write a function: function solution(A: array of longint; N: longint): longint; that, given an array A, returns the value of the missing element. For example, given array A such that: A[0] = 2 ..