题意：给定字符串中，找出五个等距离的‘*’,有输出：yes，没有输出：no；
思路：双层遍历字符串数组
import java.util.Scanner;public class A526 {public static void solve(){Scanner in=new Scanner(System.in);int n=in.nextInt();char [] s = in.next().toCharArray();for(int i=1;i<=n/4;++i){for(int j=0;j+4*i<n;++j){if(s[j]=='*'&&s[j+i]=='*'&&s[j+2*i]=='*'&&s[j+3*i]=='*'&&s[j+4*i]=='*'){System.out.println("yes");return ;}//if}//for}//forSystem.out.println("no");return;}public static void main(String [] args){new A526().solve();}
}