Problem: The only difference between easy and hard versions is a number of elements in the array.

You are given an array a consisting of n integers. The value of the i-th element of the array is a_i.

You are also given a set of m segments. The j-th segment is [l_j; r_j], where 1 ≤ l_j ≤ r_j ≤ n.

You can choose some subset of the given set of segments and decrease values on each of the chosen segments by one (independently). For example, if the initial array a = [0, 0, 0, 0, 0] and the given segments are [1; 3] and [2; 4] then you can choose both of them and the array will become b = [-1, -2, -2, -1, 0].

You have to choose some subset of the given segments (each segment can be chosen at most once) in such a way that if you apply this subset of segments to the array a and obtain the array b then the value max_{i=1}^{n}b_i - min_{i=1}^{n}b_i will be maximum possible.

Note that you can choose the empty set.

If there are multiple answers, you can print any.

If you are Python programmer, consider using PyPy instead of Python when you submit your code.

Input

The first line of the input contains two integers n and m (1 ≤ n ≤ 10^5, 0 ≤ m ≤ 300) — the length of the array a and the number of segments, respectively.

The second line of the input contains n integers a_1, a_2, ..., a_n (-10^6 ≤ a_i ≤ 10^6), where a_i is the value of the i-th element of the array a.

The next m lines are contain two integers each. The j-th of them contains two integers l_j and r_j (1 ≤ l_j ≤ r_j ≤ n), where l_j and r_j are the ends of the j-th segment.

Output

In the first line of the output print one integer d — the maximum possible value max_{i=1}^{n}b_i - min_{i=1}^{n}b_i if b is the array obtained by applying some subset of the given segments to the array a.

In the second line of the output print one integer q (0 ≤ q ≤ m) — the number of segments you apply.

In the third line print q distinct integers c_1, c_2, ..., c_q in any order (1 ≤ c_k ≤ m) — indices of segments you apply to the array a in such a way that the value max_{i=1}^{n}b_i - min_{i=1}^{n}b_i of the obtained array b is maximum possible.

If there are multiple answers, you can print any.

Examples

Input


5 4
2 -2 3 1 2
1 3
4 5
2 5
1 3


Output


6
2
4 1 


Input


5 4
2 -2 3 1 4
3 5
3 4
2 4
2 5


Output


7
2
3 2 


Input


1 0
1000000


Output


0
0

Note

In the first example the obtained array b will be [0, -4, 1, 1, 2] so the answer is 6.

In the second example the obtained array b will be [2, -3, 1, -1, 4] so the answer is 7.

In the third example you cannot do anything so the answer is 0.

Solution (in JAVA):

Solution:
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.util.Comparator;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Abhas Jain
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        E2ArrayAndSegmentsHardVersion solver = new E2ArrayAndSegmentsHardVersion();
        solver.solve(1, in, out);
        out.close();
    }

    static class E2ArrayAndSegmentsHardVersion {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.ni();
            int m = in.ni();
            int[] ar = new int[n];
            long lo = Integer.MAX_VALUE;
            long hi = Integer.MIN_VALUE;
            for (int i = 0; i < n; ++i) {
                ar[i] = in.ni();
                lo = Math.min(lo, ar[i]);
                hi = Math.max(hi, ar[i]);
            }
            Pair[] pr = new Pair[m];
            segTree st = new segTree(n);
            st.build(1, 0, n - 1, ar);
            Pair[] start = new Pair[m];
            Pair[] end = new Pair[m];
            for (int i = 0; i < m; ++i) {
                int a = in.ni() - 1, b = in.ni() - 1;
                st.update(1, 0, n - 1, a, b, -1);
                start[i] = new Pair(a, b);
                end[i] = new Pair(a, b);
                pr[i] = new Pair(a, b);
            }
            Arrays.sort(start, new Comparator<Pair>() {

                public int compare(Pair o1, Pair o2) {
                    return Integer.compare(o1.F, o2.F);
                }
            });
            Arrays.sort(end, new Comparator<Pair>() {

                public int compare(Pair o1, Pair o2) {
                    return Integer.compare(o1.S, o2.S);
                }
            });
            long ans = hi - lo;
            int idx = -1;
            int s = 0, e = 0;
            for (int i = 0; i < n; ++i) {
                long max = ar[i];
                while (s < m && start[s].F == i) {
                    st.update(1, 0, n - 1, start[s].F, start[s].S, 1);
                    s++;
                }
                while (e < m && end[e].S == i - 1) {
                    st.update(1, 0, n - 1, end[e].F, end[e].S, -1);
                    e++;
                }
                if (max - st.tree[1] > ans) {
                    ans = max - st.tree[1];
                    idx = i;
                }
            }
            if (idx == -1) {
                out.println(ans);
                out.print(0);
            } else {
                out.println(ans);
                ArrayList<Integer> arr = new ArrayList<>();
                for (int i = 0; i < m; ++i) {
                    if (pr[i].F > idx || pr[i].S < idx) arr.add(i + 1);
                }
                out.println(arr.size());
                for (int g : arr) out.print(g + " ");
            }
        }

        public class segTree {
            int[] tree;
            int[] lazy;

            public segTree(int n) {
                tree = new int[4 * n + 2];
                lazy = new int[4 * n + 2];
            }

            public void build(int node, int l, int r, int[] ar) {
                if (l == r) {
                    tree[node] = ar[l];
                    return;
                }
                int mid = (l + r) / 2;
                build(2 * node, l, mid, ar);
                build(2 * node + 1, mid + 1, r, ar);
                tree[node] = Math.min(tree[2 * node], tree[2 * node + 1]);
            }

            public void update(int node, int l, int r, int s, int e, int val) {
                if (lazy[node] != 0) {
                    tree[node] += lazy[node];
                    if (l != r) {
                        lazy[2 * node] += lazy[node];
                        lazy[2 * node + 1] += lazy[node];
                    }
                    lazy[node] = 0;
                }
                if (l > e || r < s) return;
                if (l >= s && r <= e) {
                    tree[node] += val;
                    if (l != r) {
                        lazy[2 * node] += val;
                        lazy[2 * node + 1] += val;
                    }
                    return;
                }
                int mid = (l + r) / 2;
                update(2 * node, l, mid, s, e, val);
                update(2 * node + 1, mid + 1, r, s, e, val);
                tree[node] = Math.min(tree[2 * node], tree[2 * node + 1]);
            }

        }

        public class Pair {
            int F;
            int S;

            public Pair(int f, int s) {
                F = f;
                S = s;
            }

        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int ni() {
            return Integer.parseInt(next());
        }

    }
}