Given three numbers N, A and B. Find how integers in range from 1 to N are divisible by A or B.

Input:
Input contains three integers N, A and B separated by space.

Output:
Print total numbers of integers in range from 1 to N are divisible by A or B.

Constraints:

Test Files 1 to 5:
1<=N<=100
1<=A<=100
1<=B<=100

Test Files 6 to 10
1<=N<=10¹²
1<=A<=10⁵
1<=B<=10⁵