Lesson - 4:4 - PermCheck | Codility for Programmers | Problem Solving | Java

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 function: class Solution { public int solution(int[] A); } that, given an array A, returns 1 if array A is a permutation and 0 if it is not. #Java #Codility #Algorithm