Codeforces A. Magnets

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#include<bits/stdc++.h>

//#include<cstdio>
//#include<iostream>
//#include<algorithm>
//#include<vector>
//#include<cstring>
//#include<cmath>
//#include<map>

using namespace std;

#define fast ios_base::sync_with_stdio(false)
#define bfast cin.tie(0)
#define outs(x) cout << x << " "
#define outn(x) cout << x << "\n"
#define sf scanf
#define pf printf

typedef long long LL;
typedef vector<int>vii;
typedef vector<LL>vll;

int main()
{
    fast;
    int n , i , cnt=0;
    string s, tmp="";
    while(cin >> n)
    {
        tmp="";
        cnt=0;

        cin >> s;

        tmp = s;

        for(i=1; i<n; i++)
        {
            cin >> s;

            if(s != tmp)
            {
                cnt++;
            }

            tmp = s;
        }

        cnt++;

        outn(cnt);
    }

    return 0;
}

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