#include <bits/stdc++.h>
#define F first
#define S second
#define mp make_pair
#define pb push_back
#define INF 0x3f3f3f3f
#define LINF 0x3f3f3f3f3f3f3f3fLL

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef pair<int,int> ii;
typedef vector<ii> vii;
typedef map<string,int> msi;
typedef map<int,int> mi;

int main(){
    int n,l,c;
    while(!cin.eof()){
        cin >>n>>l>>c;
        unsigned long int chars = c;
        unsigned long int lines = l;
        unsigned long int pages = 1;
        for(int i=0;i<n;i++){
            string word;
            cin>>word;
            if(word.size() > chars){
                chars =c-word.size();
                lines--;
                if(lines ==0){
                    lines =l;
                    pages++;
                }
            }else{
                chars-=word.size();
            }
            if(chars>0)chars--;
        }
        cout << pages<<'\n';
    }
    return 0;
}