Either, but Not Both

Positive integers $N$, $A$, and $B$ are given. Here, $A \neq B$.

Output the number of integers from $1$ to $N$ (inclusive) that are divisible by exactly one of $A$ and $B$.

The input is given in the following format.

N
A
B

Output the count from the problem, without the unit (個). Output nothing other than the answer. Do not print prompts such as a request for input.

• $1 \leq N \leq 100$.
• $1 \leq A \leq 100$.
• $1 \leq B \leq 100$.
• $A \neq B$.
• All input values are integers.