#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll n,t,m,cnt,q,ok,flg;
vector<ll> a;
int main(){
	cin>>n>>t>>m;
	a.push_back(0);
	for(int i=1;i<=n;i++){
		cin>>q;
		while(q>=t){
			a.push_back(t),q-=t;
		}
		a.push_back(q);
	}
	for(int i=1;i<=a.size();i++){
		ok=flg=0;
		for(int j=1;j<=a.size();j++){
			if(ok+a[j]<=t&&a[j]!=0) ok+=a[j],a[j]=0,flg=1;
		}
		if(flg) cnt+=m;
		else break;
	}
	cout<<cnt;
    return 0;
}