#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define st first
#define nd second
typedef long long ll;
typedef long double ld;
const ll I = 1'000'000'000'000'000'000LL;
const int II = 2'000'000'000;
const ll M = 1'000'000'007LL;
const int N = 1<<18;
int fau[N];
pair<int, pair<int, int>> e[N];
vector<int> ed[N];
int tab[N];
ll ans = 0LL;
int Find(int v)
{
if(fau[v] == v) return v;
return (fau[v] = Find(fau[v]));
}
void Union(int a, int b)
{
fau[Find(b)] = Find(a);
}
void Solve()
{
int n, m, a, b, q, ma = 0;
cin >> n >> m >> q;
for(int i = 1; i <= n; ++i)
{
fau[i] = i;
cin >> tab[i];
ans -= tab[i];
ma = max(ma, tab[i]);
}
ans += ma;
for(int i = 1; i <= m; ++i)
{
cin >> a >> b;
e[i] = pair{tab[a] + tab[b], pair{a, b}};
}
sort(e + 1, e + 1 + m);
for(int i = 1; i <= m; ++i)
{
if(Find(e[i].nd.st) == Find(e[i].nd.nd)) continue;
ans += e[i].st;
Union(e[i].nd.st, e[i].nd.nd);
}
cout << ans << "\n";
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//int t; cin >> t;
//while(t--)
Solve();
return 0;
}
