There people in your city. The person contains health point. You are trying to make these people walk in your locality. You walk for days. On the day, every walk decreases health points of the person you are walking with. Also, on the day, you can only walk with the person if the person is still healthy and is a multiple of . You can walk with as many people as you can but you can walk with a specific person only once in a day.
A person becomes unhealthy if their health point becomes less than or equal to . At the end of each day, their health points are restored to their original level if they are not unhealthy already.
Your task is to determine the day in which the person becomes unhealthy or will remain healthy.
Input format
Output format
Print lines where the of these lines contain a single integer, denoting the day when the person becomes unhealthy. Otherwise, print if the person never becomes unhealthy.
Constraints
In the first sample,
and people become unhealthy in the day.
and person becomes unhealthy in the day.
person becomes unhealthy in the day.
person remains healthy.