. . .
. . x
. x .
x . .
x . x
x x .
. x x
以上情況都是一樣的,加一個路燈即可。
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int t = in.nextInt();
while(t-- > 0) {
int n = in.nextInt();
in.nextLine();
String r = in.nextLine();
int count = 0;
for(int i = 0;i < r.length();i++) {
if(r.charAt(i) == '.') {
i += 2;
count++;
}
}
System.out.println(count);
}
}
}