In simpler words you will be given k, l, m, n and d as inputs. now you need to count the numbers starting from 1 and ending at d, which are divisible by atleast one of k,l,m,n;
Explanation of sample input 1 :
here d=12, so you need to count numbers from 1,2,3,.....,12 which are divisible by atleast one of (1,2,3,4). You can observe that count = 12.