Problem: Dima's spent much time thinking what present to give to Inna and gave her an empty sequence w. Now they want to fill sequence w with numbers zero and one. For that, they decided to play an amusing game. 

Before the game begins, Dima chooses m integers a1, a2, ..., am (1 ≤ a1 < a2 < ... < am). Then Inna and Dima start playing, that is, adding numbers to sequence w. Each new number they choose is added to the end of the sequence. At some moments of time Dima feels that the game is going to end too soon (and he wants to play with Inna as long as possible), so he hits a table hard with his fist. At that the a1-th, a2-th, a3-th, ..., ak-th numbers from the beginning simultaneously fall out of the sequence (the sequence gets k numbers less). Here k is such maximum number that value ak doesn't exceed the current length of the sequence. If number a1 is larger than the current length of w, then nothing falls out of the sequence.

You are given the chronological sequence of events in the game. Each event is either adding a number to the end of sequence w or Dima's hit on the table. Calculate the sequence w after all these events happen.

Input

The first line of the input contains two integers n and m (1 ≤ n, m ≤ 106) showing how many events took place and how many numbers Dima chose.

The next line contains m distinct integers ai (1 ≤ ai ≤ 106) sorted in the increasing order. 

Next n lines describe the events in the chronological order. Each line contains a single integer: -1, 0 or 1. Number -1 means that Dima hits the table. Number 0 means that Inna and Dima add number 0 to the end of the sequence. Number 1 means that Inna and Dima add number 1 to the end of the sequence.

Output

In a single line print a sequence of numbers 0 and 1 — the elements of the sequence after all events happen. Print the elements of the sequence in the order from the beginning to the end of the sequence.

If after all events the sequence ends up empty, print "Poor stack!".

Examples

Input

10 3
1 3 6
-1
1
1
0
0
-1
0
1
-1
1


Output

011


Input

2 1
1
1
-1


Output

Poor stack!

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;

public class D {

    int offset;
    int[] h;

    int count(int l, int r) {
        if (l == r) {
            return h[l + offset];
        }
        l += offset;
        r += offset;
        int result = h[l] + h[r];
        while ((l >>> 1) != (r >>> 1)) {
            if ((l & 1) == 0) {
                result += h[l + 1];
            }
            if ((r & 1) == 1) {
                result += h[r - 1];
            }
            l >>>= 1;
            r >>>= 1;
        }
        return result;
    }

    void update(int i, int v) {
        i += offset;
        while (i > 0) {
            h[i] += v;
            i >>>= 1;
        }
    }

    void solve() throws IOException {
        in = new InputReader("__std");
        out = new OutputWriter("__std");

        int n = in.readInt();
        int m = in.readInt();
        int[] a = new int[m];
        for (int i = 0; i < m; ++i) {
            a[i] = in.readInt();
        }

        char[] w = new char[n];

        offset = 1;
        while (offset < n) offset <<= 1;
        h = new int[offset << 1];

        int k = 0;
        int len = 0;
        while (n-- > 0) {
            int v = in.readInt();
            if (v == -1) {
                int s = 0;
                while (s < m && a[s] <= k) {
                    ++s;
                }
                int b = len;
                for (int i = s - 1; i >= 0; --i) {
                    int l = 0;
                    int r = b - 1;
                    while (l < r) {
                        int mid = (l + r) >>> 1;
                        int c = count(0, mid);
                        if (c < a[i]) {
                            l = mid + 1;
                        } else {
                            r = mid;
                        }
                    }
                    update(l, -1);
                    w[l] = 'x';
                    b = l;
                }
                k -= s;
            } else {
                update(len, 1);
                w[len++] = (char) ('0' + v);
                ++k;
            }
        }

        if (k == 0) {
            out.println("Poor stack!");
        } else {
            int s = 0;
            for (int i = 0; i < len; ++i) {
                if (w[i] == 'x') {
                    ++s;
                } else {
                    w[i - s] = w[i];
                }
            }
            out.println(String.valueOf(w, 0, k));
        }

        exit();
    }

    void exit() {
        //System.err.println((System.currentTimeMillis() - startTime) + " ms");
        out.close();
        System.exit(0);
    }

    InputReader in;
    OutputWriter out;

    //long startTime = System.currentTimeMillis();

    public static void main(String[] args) throws IOException {
        new D().solve();
    }

    class InputReader {

        private InputStream stream;

        private byte[] buffer = new byte[1024];
        private int pos, len;

        private int cur;

        private StringBuilder sb = new StringBuilder(32);

        InputReader(String name) throws IOException {
            if (name.equals("__std")) {
                stream = System.in;
            } else {
                stream = new FileInputStream(name);
            }
            cur = read();
        }

        private int read() throws IOException {
            if (len == -1) {
                throw new EOFException();
            }
            if (pos >= len) {
                pos = 0;
                len = stream.read(buffer);
                if (len == -1) return -1;
            }
            return buffer[pos++];
        }

        char readChar() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            char res = (char) cur;
            cur = read();
            return res;
        }

        int readInt() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            while (whitespace()) {
                cur = read();
            }
            if (cur == -1) {
                throw new EOFException();
            }
            int sign = 1;
            if (cur == '-') {
                sign = -1;
                cur = read();
            }
            int res = 0;
            while (!whitespace()) {
                if (cur < '0' || cur > '9') {
                    throw new NumberFormatException();
                }
                res *= 10;
                res += cur - '0';
                cur = read();
            }
            return res * sign;
        }

        long readLong() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            return Long.parseLong(readToken());
        }

        double readDouble() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            return Double.parseDouble(readToken());
        }

        String readLine() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            sb.setLength(0);
            while (cur != -1 && cur != '\r' && cur != '\n') {
                sb.append((char) cur);
                cur = read();
            }
            if (cur == '\r') {
                cur = read();
            }
            if (cur == '\n') {
                cur = read();
            }
            return sb.toString();
        }

        String readToken() throws IOException {
            if (cur == -1) {
                throw new EOFException();
            }
            while (whitespace()) {
                cur = read();
            }
            if (cur == -1) {
                throw new EOFException();
            }
            sb.setLength(0);
            while (!whitespace()) {
                sb.append((char) cur);
                cur = read();
            }
            return sb.toString();
        }

        boolean whitespace() {
            return cur == ' ' || cur == '\t' || cur == '\r' || cur == '\n' || cur == -1;
        }

        boolean eof() {
            return cur == -1;
        }
    }

    class OutputWriter {

        private PrintWriter writer;

        OutputWriter(String name) throws IOException {
            if (name.equals("__std")) {
                writer = new PrintWriter(System.out);
            } else {
                writer = new PrintWriter(name);
            }
        }

        void print(String format, Object ... args) {
            writer.print(new Formatter(Locale.US).format(format, args));
        }

        void println(String format, Object ... args) {
            writer.println(new Formatter(Locale.US).format(format, args));
        }

        void print(Object value) {
            writer.print(value);
        }

        void println(Object value) {
            writer.println(value);
        }

        void println() {
            writer.println();
        }

        void close() {
            writer.close();
        }
    }
}