#include <bits/stdc++.h>
#define db double
#define il inline
#define re register
#define ll long long
#define ui unsigned
#define ull ui ll
#define i128 __int128
#define pii pair<int, int>
#define fi first
#define se second
#define eb emplace_back
#define SZ(v) (int)v.size()
#define ALL(v) v.begin(), v.end()
#define mems(v, x) memset(v, x, sizeof(v))
#define memc(a, b) memcpy(a, b, sizeof(a))
#define FOR(i, L, R) for(re int i = (L); i <= (R); ++i)
#define ROF(i, R, L) for(re int i = (R); i >= (L); --i)
#define LS i << 1, l, mid
#define RS i << 1 | 1, mid + 1, r
#define popc(x) __builtin_popcount(x)
using namespace std;
#define N 20
#define P 1000000007
il int add(int x, int y) {return x + y < P ? x + y : x + y - P;}
il void addr(int &x, int y) {(x += y) >= P && (x -= P);}
il int qpow(int p, int n = P - 2) {
  int s = 1;
  while(n) {
    if(n & 1) s = 1ll * s * p % P;
    p = 1ll * p * p % P, n >>= 1;
  }
  return s;
}
il void chkmin(ll &x, ll y) {(x > y) && (x = y);}
int n, m, p[N + 5], tr[N]; ll dp[1 << N];
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);
  while(cin >> n >> m) {
    FOR(i, 1, n) cin >> p[i];
    sort(p + 1, p + 1 + n), mems(tr, 0);
    while(m--) {
      int u, v; cin >> u >> v, --u, --v;
      tr[u] |= 1 << v, tr[v] |= 1 << u;
    }
    int A = (1 << n) - 1;
    FOR(S, 0, A) dp[S] = 1e18; dp[0] = 0;
    FOR(S, 0, A - 1) {
      ll s = 0; int now = popc(S) + 1;
      FOR(u, 0, n - 1) if(S >> u & 1)
        s += popc(tr[u] & (S ^ A));
      s = s * (p[now] - p[now - 1]);
      FOR(u, 0, n - 1) if(!(S >> u & 1))
        chkmin(dp[S | (1 << u)], dp[S] + s);
    }
    cout << dp[A] << "\n";
  }
  cerr << 1.0 * clock() / CLOCKS_PER_SEC;
  return 0;
}