#include "bits/stdc++.h"
using namespace std;
#define ar array
typedef long long ll;
#define int ll
signed main(){
ios::sync_with_stdio(0); cin.tie(0);
int X, n, m, w, t; cin >> X >> n >> m >> w >> t;
vector<int> s(n), d(m), c(m);
vector<ar<int, 2>> a;
for(int i=0;i<n;i++){
cin >> s[i];
a.push_back({s[i] % t, -s[i]});
}
for(int i=0;i<m;i++){
cin >> d[i] >> c[i];
a.push_back({d[i], c[i]});
}
a.push_back({X % t, -X});
a.push_back({0, 0});
sort(a.begin(), a.end());
a.erase(unique(a.begin(), a.end()), a.end());
int sz = a.size();
vector<int> pref(sz), cnt(sz), tot(sz);
for(int i=1;i<sz;i++){
pref[i] = pref[i-1], cnt[i] = cnt[i-1];
if(a[i][1] > 0){
tot[i] = X / t + (a[i][0] <= (X % t));
pref[i] += a[i][1];
cnt[i]++;
}
}
vector<int> dp(sz);
dp[0] = (X / t + 1) * w;
for(int i=1;i<sz;i++){
if(a[i][1] > 0){
dp[i] = dp[i-1] + tot[i] * w;
continue;
}
dp[i] = dp[i-1];
int s = -a[i][1] / t;
for(int j=0;j<i;j++){
//~ cout<<j<<" "<<i<<" "<<dp[j]<<" "<<s * w * (cnt[i] - cnt[j])<<" "<<pref[i] - pref[j]<<"\n";
dp[i] = min(dp[i], dp[j] + s * w * (cnt[i] - cnt[j]) + pref[i] - pref[j]);
}
}
//~ for(int i=0;i<sz;i++){
//~ cout<<dp[i]<<" ";
//~ } cout<<"\n";
//~ for(int i=0;i<sz;i++){
//~ cout<<a[i][0]<<" ";
//~ } cout<<"\n";
//~ for(int i=0;i<sz;i++){
//~ cout<<a[i][1]<<" ";
//~ } cout<<"\n";
cout<<dp[sz - 1]<<"\n";
}
