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[Codility] Lesson 7 : Fish - JAVA 문제 You are given two non-empty arrays A and B consisting of N integers. Arrays A and B represent N voracious fish in a river, ordered downstream along the flow of the river. The fish are numbered from 0 to N − 1. If P and Q are two fish and P < Q, then fish P is initially upstream of fish Q. Initially, each fish has a unique position. Fish number P is represented by A[P] and B[P]. Array A contai.. 더보기
[Codility] Lesson 7 : Brackets - JAVA 문제 A string S consisting of N characters is considered to be properly nested if any of the following conditions is true: - S is empty; - S has the form "(U)" or "[U]" or "{U}" where U is a properly nested string; - S has the form "VW" where V and W are properly nested strings. - For example, the string "{[()()]}" is properly nested but "([)()]" is not. Write a function: class Solution { public i.. 더보기
[Codility] Lesson 6 : NumberOfDiscIntersections - JAVA 문제 We draw N discs on a plane. The discs are numbered from 0 to N − 1. An array A of N non-negative integers, specifying the radiuses of the discs, is given. The J-th disc is drawn with its center at (J, 0) and radius A[J]. We say that the J-th disc and K-th disc intersect if J ≠ K and the J-th and K-th discs have at least one common point (assuming that the discs contain their borders). The fig.. 더보기
[Codility] Lesson 6 : Triangle - JAVA 문제 An array A consisting of N integers is given. A triplet (P, Q, R) is triangular if 0 ≤ P A[R], A[Q] + A[R] > A[P], A[R] + A[P] > A[Q]. For example, consider array A such that: A[0] = 10 A[1] = 2 A[2] = 5 A[3] = 1 A[4] = 8 A[5] = 20 Triplet (0, 2, 4) is triangular. Write a function: class Solution { public int solution(int[] A); } that, given an array A consistin.. 더보기
[Codility] Lesson 6 : MaxProductOfThree - JAVA 문제 A non-empty array A consisting of N integers is given. The product of triplet (P, Q, R) equates to A[P] * A[Q] * A[R] (0 ≤ P < Q < R < N). For example, array A such that: A[0] = -3 A[1] = 1 A[2] = 2 A[3] = -2 A[4] = 5 A[5] = 6 contains the following example triplets: (0, 1, 2), product is −3 * 1 * 2 = −6 (1, 2, 4), product is 1 * 2 * 5 = 10 (2, 4, 5), product is 2 * 5 * 6 = 60 Your goal is to.. 더보기
[Codility] Lesson 6 : Distinct - JAVA 문제 Write a function class Solution { public int solution(int[] A); } that, given an array A consisting of N integers, returns the number of distinct values in array A. For example, given array A consisting of six elements such that: A[0] = 2 A[1] = 1 A[2] = 1 A[3] = 2 A[4] = 3 A[5] = 1 the function should return 3, because there are 3 distinct values appearing in array A, namely 1, 2 and 3. Writ.. 더보기
[Codility] Lesson 5 : MinAvgTwoSlice - JAVA 문제 A non-empty array A consisting of N integers is given. A pair of integers (P, Q), such that 0 ≤ P < Q < N, is called a slice of array A (notice that the slice contains at least two elements). The average of a slice (P, Q) is the sum of A[P] + A[P + 1] + ... + A[Q] divided by the length of the slice. To be precise, the average equals (A[P] + A[P + 1] + ... + A[Q]) / (Q − P + 1). For example, a.. 더보기
[Codility] Lesson 5 : GenomicRangeQuery - JAVA 문제 A DNA sequence can be represented as a string consisting of the letters A, C, G and T, which correspond to the types of successive nucleotides in the sequence. Each nucleotide has an impact factor, which is an integer. Nucleotides of types A, C, G and T have impact factors of 1, 2, 3 and 4, respectively. You are going to answer several queries of the form: What is the minimal impact factor of.. 더보기

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