#include <bits/stdc++.h>
using namespace std;
int main() {
long long x, t, w;
int n, m;
cin >> x >> n >> m >> w >> t;
long long s[n+1];
for(int i=0;i<n;i++)
cin >> s[i];
s[n++] = x;
pair<long long, long long> ppl[m];
for(int i=0;i<m;i++)
cin >> ppl[i].first >> ppl[i].second;
long long d[m], c[m];
for(int i=0;i<m;i++)
d[i] = ppl[i].first, c[i] = ppl[i].second;
sort(s,s+n);
sort(ppl,ppl+m);
long long dp[m+1][m+1];
memset(dp,1,sizeof(dp));
dp[m][m] = 0;
for(int i=m;i;i--)
for(int j=i;j<m+1;j++) {
dp[i-1][i-1] = min(dp[i-1][i-1],dp[i][j]);
long long minT = 1e18;
for(int k=0;k<n;k++)
if((s[k] % t) > d[i-1] && (j == m || (s[k] % t) < d[j]))
minT = min(minT, s[k]);
minT -= (minT % t);
minT += d[i-1];
if(minT < 1e18)
dp[i-1][j] = dp[i][j] + c[i-1] - (x - minT) / t * w - w;
}
long long ans = *min_element(dp[0],dp[0]+m+1);
ans += w * ((x / t) + 1);
for(int i=0;i<m;i++)
ans += w * ((x - d[i]) / t + 1);
cout << ans;
}
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