#include <bits/stdc++.h>
using namespace std;

#define int long long 
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define pb push_back
#define all(a) a.begin(), a.end()
#define endl "\n"

void printVector(vector<int> a){
    for (auto x: a) cout << x << " ";
    cout << endl;
}

void solve(){
    int n, m, k; cin >> n >> m >> k;
    vector<int> c(n);


    FOR(i,0,n) cin >> c[i];
    int ans = 1;
    FOR(i,1,n){
        if (c[i] != c[i-1]) ans++;
    }
    cout << ans << endl;
}


int32_t main(){
    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    ios::sync_with_stdio(false);cin.tie(nullptr);
    int t = 1; // cin >> t;
    while (t--) solve();
}