import java.util.*; public class Main {     public static void main(String[] args) {         Scanner input = new Scanner(System.in);         int len = Integer.valueOf(input.nextLine());         String s = input.nextLine();         boolean isBig = false;         int count = 0;         for (int i=0; i < s.length(); i++ ){             if (isBig) {                 if (Character.isUpperCase(s.charAt(i)))                     continue;                 else {                     count++;                     if (i + 1 < s.length() && Character.isLowerCase(s.charAt(i + 1)))                         isBig = false;                 }             }             else {                 if (Character.isLowerCase(s.charAt(i)))                     continue;                 else {                     count++;                     if (i+1<s.length()&&Character.isUpperCase(s.charAt(i+1)))                         isBig=true;                 }             }         }         count += len;         System.out.println(count);     } } AC