#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main () {
    int N, M;
    cin >> N >> M;
    ll H[200020];
    for (int i = 0; i < N; i ++) {
        cin >> H[i];
    }
    vector<int> gr[100010];
    for (int i = 0; i < M; i ++) {
        int a, b;
        cin >> a >> b;
        gr[--a].push_back(--b);
        gr[b].push_back(a);
    }
    ll dp1[100010][2], dp2[100010][2];
    for (int i = 0; i < N; i ++) {
        for (int j = 0; j < 2; j ++) {
            dp1[i][j] = dp2[i][j] = -(ll)1e18;
        }
    }
    dp1[0][0] = dp1[0][1] = dp2[N-1][0] = dp2[N-1][1] = 0;
    for (int i = 0; i < N - 1; i ++) {
        for (int j = 0; j < 2; j ++) {
            for (auto v : gr[i]) {
                if (H[v] > H[i] && j) {
                    continue;
                }
                if (v <= i) {
                    continue;
                }
                int p = H[v] > H[i];
                dp1[v][p] = max(dp1[v][p], dp1[i][j] + max(0ll, H[v] - H[i]));
            }
        }
    }
    for (int i = N - 1; i > 0; i --) {
        for (int j = 0; j < 2; j ++) {
            for (auto v : gr[i]) {
                if (H[v] > H[i] && j) {
                    continue;
                }
                if (v >= i) {
                    continue;
                }
                int p = H[v] > H[i];
                dp2[v][p] = max(dp2[v][p], dp2[i][j] + max(0ll, H[v] - H[i]));
            }
        }
    }
    ll ans1 = max(dp1[N-1][0], dp1[N-1][1]), ans2 = max(dp2[0][0], dp2[0][1]);
    cout << (ans1 < 0 ? -1 : ans1) << '\n' << (ans2 < 0 ? -1 : ans2) << endl;
}