#D7055. Taking a Seat
Taking a Seat
Taking a Seat
A: Taking a Seat-Taking a Seat-
story
Mr. A entered the classroom at the examination site to take an examination. However, Mr. A is a very nervous type. Therefore, depending on the situation, there may be seats that Mr. A does not want to sit in. Therefore, Mr. A decided to find out how many seats he could sit on based on certain conditions.
problem
Mr. A is a nervous type of person. First of all, Mr. A cannot sit in the first row from the front. Because when I sit near the proctor, I get nervous and can't solve the problem. Also, if there is a person on the right or left, Mr. A cannot sit down. This is because the sound of the pencil next to me makes it impossible to concentrate during the test. In addition, you can't sit near a noisy guy (near 8 diagonally up, down, left, and right). This is because my voice echoes in my head during the break and I can't rest. Also, it's natural, but I can't sit in the seat where the students are already sitting.
Is there a place where Mr. A can sit under these conditions? Assuming that M x N seats are lined up in the classroom, let's find the number.
Input format
The first row gives M (number of rows: number of vertical seats) and N (number of columns: number of horizontal seats). From the second line, M lines and a character string of length N are given line by line. The j character of the i-th character string represents the state of the seat in the i-th row and the j-th column. Each letter is either'-',' x'or'o', vacant seats'-', noisy students sitting during breaks'x', other students sitting' Let it be o'.
Constraint
- 0 <M ≤ 100
- 0 <N ≤ 100
Output format
Output the number of seats that Mr. A can sit in one line depending on the conditions. Don't forget the line break at the end.
Input example 1
5 5 --o-- --xo- --x-- o --- x --xoo
Output example 1
3
Input example 2
2 6 --oooo x--o--
Output example 2
1
Input example 3
3 5
Output example 3
Ten
Input example 4
4 6 o-oxoo oo-ooo oooxo- o-ooox
Output example 4
0
Example
Input
5 5 --o-- --xo- --x-- o---x --xoo
Output
3
inputFormat
Input format
The first row gives M (number of rows: number of vertical seats) and N (number of columns: number of horizontal seats). From the second line, M lines and a character string of length N are given line by line. The j character of the i-th character string represents the state of the seat in the i-th row and the j-th column. Each letter is either'-',' x'or'o', vacant seats'-', noisy students sitting during breaks'x', other students sitting' Let it be o'.
Constraint
- 0 <M ≤ 100
- 0 <N ≤ 100
outputFormat
Output format
Output the number of seats that Mr. A can sit in one line depending on the conditions. Don't forget the line break at the end.
Input example 1
5 5 --o-- --xo- --x-- o --- x --xoo
Output example 1
3
Input example 2
2 6 --oooo x--o--
Output example 2
1
Input example 3
3 5
Output example 3
Ten
Input example 4
4 6 o-oxoo oo-ooo oooxo- o-ooox
Output example 4
0
Example
Input
5 5 --o-- --xo- --x-- o---x --xoo
Output
3
样例
5 5
--o--
--xo-
--x--
o---x
--xoo3