#1850. [ABC096A] Day of Takahashi

[ABC096A] Day of Takahashi

Problem Statement

In AtCoder Kingdom, Gregorian calendar is used, and dates are written in the "year-month-day" order, or the "month-day" order without the year. For example, May 33, 20182018 is written as 20182018-55-33, or 55-33 without the year.
In this country, a date is called Takahashi when the month and the day are equal as numbers. For example, 55-55 is Takahashi. How many days from 20182018-11-11 through 20182018-aa-bb are Takahashi?

Constraints

aa is an integer between 11 and 1212 (inclusive). bb is an integer between 11 and 3131 (inclusive). 20182018-aa-bb is a valid date in Gregorian calendar.

Input

Input is given from Standard Input in the following format:

aa bb

Output

Print the number of days from 20182018-11-11 through 20182018-aa-bb that are Takahashi.

Sample Input 1

5 5

Sample Output 1

5

There are five days that are Takahashi: 11-11, 22-22, 33-33, 44-44 and 55-55.

Sample Input 2

2 1

Sample Output 2

1

There is only one day that is Takahashi: 11-11.

Sample Input 3

11 30

Sample Output 3

11

There are eleven days that are Takahashi: 11-11, 22-22, 33-33, 44-44, 55-55, 66-66, 77-77, 88-88, 99-99, 1010-1010 and 1111-1111.