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 (GCC 9.2.1) (judge verdict: Accepted)

//  cd Desktop/Atcoder
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define rep(i,n) for(i=0;i<(n);i++)
#define ll long long
#define ull unsigned long long
#define MOD 1000000007

int main(){
    int n,i,count=0;
    char s[100002]={};
    scanf("%d",&n);
    scanf("%s",s);
    s[n]='A';
    rep(i,n){
        if(s[i]!=s[i+1])count++;
    }
    printf("%d",count);
    return 0;
}