CCF_201509-1_数列分段

水。

#include<iostream>
#include<cstdio>
using namespace std;
 
int main()
{
    int n,a[];
    cin >> n;
    for(int i = ;i <= n;i++)   cin >> a[i];
    int now = a[],num = ;
    for(int i = ;i <= n;i++)
    {
        if(now != a[i])
        {
            num++;
            now = a[i];
        }
    }
    cout << num << endl;
}