CCF 201509-1 数列分段

#include <iostream>

using namespace std;



int main()
{
    int n;
    cin>>n;
    int a,b,count=1;
    cin>>a;
    for(int i=1;i<n;i++){
        cin>>b;
        if(a!=b)
            count++;
        a=b;
    }
    cout<<count;
    return 0;
}