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.util.InputMismatchException;
import java.io.IOException;
import java.util.ArrayList;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author cunbidun
 */
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 {
        static final int MAXA = (int) 1e5 + 10;
        static final int INF = (int) 2e9 + 7;
        int[] a = new int[MAXA];
        int[] segmentTree = new int[MAXA * 4];
        int[] lazy = new int[MAXA * 4];
        PairIntInt[] seg = new PairIntInt[MAXA];
        ArrayList<Integer>[] end = new ArrayList[MAXA];
        ArrayList<Integer>[] start = new ArrayList[MAXA];
        ArrayList<Integer> res = new ArrayList<>();
        int ans = 0;

        private void trueVal(int id, int l, int r) {
            if (lazy[id] == 0 || l > r) return;
            segmentTree[id] += lazy[id];
            if (l != r) {
                lazy[id * 2] += lazy[id];
                lazy[id * 2 + 1] += lazy[id];
            }
            lazy[id] = 0;
        }

        private void buildTree(int id, int l, int r) {
            if (l > r) return;
            if (l == r) {
                segmentTree[id] = a[l];
                return;
            }
            int m = (l + r) >> 1;
            buildTree(id * 2, l, m);
            buildTree(id * 2 + 1, m + 1, r);
            segmentTree[id] = Math.min(segmentTree[id * 2], segmentTree[id * 2 + 1]);
        }

        private void update(int id, int l, int r, int tarL, int tarR) {
            trueVal(id, l, r);
            if (l > tarR || r < tarL || l > r) return;
            int m = (l + r) >> 1;
            if (tarL <= l && r <= tarR) {
                segmentTree[id] += -1;
                if (l != r) {
                    lazy[id * 2] += -1;
                    lazy[id * 2 + 1] += -1;
                }
                return;
            }
            update(id * 2, l, m, tarL, tarR);
            update(id * 2 + 1, m + 1, r, tarL, tarR);
            segmentTree[id] = Math.min(segmentTree[id * 2], segmentTree[id * 2 + 1]);
        }

        private int getMin(int id, int l, int r, int tarL, int tarR) {
            trueVal(id, l, r);
            if (l > tarR || r < tarL || l > r) return INF;
            if (tarL <= l && r <= tarR) return segmentTree[id];
            int m = (l + r) >> 1;
            return Math.min(getMin(id * 2, l, m, tarL, tarR), getMin(id * 2 + 1, m + 1, r, tarL, tarR));
        }

        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            for (int i = 0; i <= n + 1; i++) {
                start[i] = new ArrayList<>();
                end[i] = new ArrayList<>();
            }
            for (int i = 1; i <= n; i++) {
                a[i] = in.nextInt();
            }
            for (int i = 1; i <= m; i++) {
                seg[i] = new PairIntInt(in.nextInt(), in.nextInt());
                start[seg[i].first].add(i);
                end[seg[i].second].add(i);
            }
            int posI = 0;
            Arrays.fill(lazy, 0);
            Arrays.fill(segmentTree, INF);
            buildTree(1, 1, n);

//        update(1, 1, n, 1, 3);
//        update(1, 1, n, 1, 4);
//        out.println(getMin(1, 1, n, 2, 2));
//        update(1, 1, n, 2, 4);
//        out.println(getMin(1, 1, n, 1, 4));
            for (int i = 1; i <= n; i++) {
                for (int j = 0; j < end[i - 1].size(); j++) {
                    update(1, 1, n, seg[end[i - 1].get(j)].first, seg[end[i - 1].get(j)].second);
                }
//            int tmp = getMin(1, 1, n, 1, i - 1);
//            out.println(i + " " + tmp);
                int tmp = a[i] - getMin(1, 1, n, 1, i - 1);
                if (ans < tmp) {
                    ans = tmp;
                    posI = i;
                }
            }

            Arrays.fill(segmentTree, INF);
            Arrays.fill(lazy, 0);
            buildTree(1, 1, n);
            for (int i = n; i >= 1; i--) {
                for (int j = 0; j < start[i + 1].size(); j++) {
                    //out.println(i + " " + seg[start[i + 1].get(j)].first + " " + seg[start[i + 1].get(j)].second);
                    update(1, 1, n, seg[start[i + 1].get(j)].first, seg[start[i + 1].get(j)].second);
                }
                int tmp = a[i] - getMin(1, 1, n, i + 1, n);
                //out.println(i + " " + tmp);
                if (ans < tmp) {
                    ans = tmp;
                    posI = i;
                }
            }
            out.println(ans);
            for (int i = 1; i <= m; i++) {
                if (posI > seg[i].second || posI < seg[i].first) res.add(i);
            }
            out.println(res.size());
            for (int i = 0; i < res.size(); i++) {
                out.print(res.get(i) + " ");
            }
        }

    }

    static class InputReader extends InputStream {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;

        public InputReader(InputStream stream) {
            this.stream = stream;
        }

        public int read() {
            if (numChars == -1) {
                throw new InputMismatchException();
            }
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (numChars <= 0) {
                    return -1;
                }
            }
            return buf[curChar++];
        }

        public int nextInt() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do {
                if (c < '0' || c > '9') {
                    throw new InputMismatchException();
                }
                res *= 10;
                res += c - '0';
                c = read();
            } while (!isSpaceChar(c));
            return res * sgn;
        }

        public static boolean isSpaceChar(int c) {
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

    }

    static class PairIntInt implements Comparable<PairIntInt> {
        public int first;
        public int second;

        public PairIntInt(int first, int second) {
            this.first = first;
            this.second = second;
        }

        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            PairIntInt pair = (PairIntInt) o;

            return first == pair.first && second == pair.second;
        }

        public String toString() {
            return "(" + first + "," + second + ")";
        }

        public int compareTo(PairIntInt o) {
            int value = Integer.compare(first, o.first);
            if (value != 0) {
                return value;
            }
            return Integer.compare(second, o.second);
        }

    }
}