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 Kotlin (1.0.0) (judge verdict: Runtime Error)

fun main (args : Array<String>) {
	readLine()
	val s = readLine()
	var sList : MutableList<String> = mutableListOf()
	for (i in s.toString()) {
		sList.add(i.toString())
	}
	for (i in 0..sList.size - 1) {
		while (sList[i] == sList[i + 1] && sList.size > 2) {
			sList.removeAt(i)
		}
		if (i == sList.size - 1) {
			break
		}
		if (i == sList.size - 2) {
			if (sList[i] == sList[i + 1]) {
				sList.removeAt(i + 1)
			}
			break
		}
	}
	println("${sList.size}")
}