Problem:
Score : 300 points

Problem Statement

There are N slimes lining up from left to right. The colors of these slimes will be given as a string S of length N consisting of lowercase English letters. The i-th slime from the left has the color that corresponds to the i-th character of S.

Adjacent slimes with the same color will fuse into one larger slime without changing the color. If there were a slime adjacent to this group of slimes before fusion, that slime is now adjacent to the new larger slime.

Ultimately, how many slimes will be there?

Constraints

1 \leq N \leq 10^5

|S| = N

S consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

N
S

Output

Print the final number of slimes.

Sample Input 1

10
aabbbbaaca

Sample Output 1

5

Ultimately, these slimes will fuse into abaca.

Sample Input 2

5
aaaaa

Sample Output 2

1

All the slimes will fuse into one.

Sample Input 3

20
xxzaffeeeeddfkkkkllq

Sample Output 3

10

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(System.Console.ReadLine());

            string str = Console.ReadLine();
            List<string> strList = new List<string>();
            foreach(char c in str)
            {
                strList.Add(c.ToString());
            }
            
            int count = 1;
         
            string moji = string.Empty;

            for(int i=0; i<num; i++)
            {
                if(i == 0)
                {
                    moji = strList[i];
                }
                else
                {
                    if(moji != strList[i])
                    {
                        moji = strList[i];
                        count++;
                    }
                }
                
            }


            Console.Write(count);

        }
    
    }
}