【CCF】2015901-数列分段

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n, ans = 1, m;
    cin >> n >> m;
    int a;
    for (int i = 1; i < n; ++i) {
        cin >> a;
        if (a != m) {
            ++ans;
            m = a;
        }
    }
    cout <<ans<<endl;;
    return 0;
}