#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC target("avx2")
using namespace std;
#define pb push_back
#define sz size()
#define all(x) x.begin(), x.end()
#define F first
#define S second
typedef pair < int, int > pii;
typedef vector < int > vi;
typedef vector < vi > vvi;
void solve(){
int n;
cin >> n;
char a[n + 7];
for (int i = 1; i <= n; i++) {
cin >> a[i];
}
int ans = 0;
for (int i = 1; i <= n; i++) {
int pos = n;
for (int j = i + 1; j <= n; j++) {
if (a[i] != a[j]) {
pos = j - 1;
break;
}
}
ans++;
i = pos;
}
cout << ans + 1;
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int t = 1;
//cin >> t;
while (t--) {
solve();
cout << "\n";
}
}
