Problem: Mike and some bears are playing a game just for fun. Mike is the judge. All bears except Mike are standing in an n × m grid, there's exactly one bear in each cell. We denote the bear standing in column number j of row number i by (i, j). Mike's hands are on his ears (since he's the judge) and each bear standing in the grid has hands either on his mouth or his eyes.

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They play for q rounds. In each round, Mike chooses a bear (i, j) and tells him to change his state i. e. if his hands are on his mouth, then he'll put his hands on his eyes or he'll put his hands on his mouth otherwise. After that, Mike wants to know the score of the bears.

Score of the bears is the maximum over all rows of number of consecutive bears with hands on their eyes in that row.

Since bears are lazy, Mike asked you for help. For each round, tell him the score of these bears after changing the state of a bear selected in that round. 

Input

The first line of input contains three integers n, m and q (1 ≤ n, m ≤ 500 and 1 ≤ q ≤ 5000).

The next n lines contain the grid description. There are m integers separated by spaces in each line. Each of these numbers is either 0 (for mouth) or 1 (for eyes).

The next q lines contain the information about the rounds. Each of them contains two integers i and j (1 ≤ i ≤ n and 1 ≤ j ≤ m), the row number and the column number of the bear changing his state.

Output

After each round, print the current score of the bears.

Examples

Input

5 4 5
0 1 1 0
1 0 0 1
0 1 1 0
1 0 0 1
0 0 0 0
1 1
1 4
1 1
4 2
4 3


Output

3
4
3
3
4

Solution (in JAVA):

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

public class B {

    private static class Solution implements Runnable {

        private static final long modulo = 1000000007;


        private void solve() {
            int n = in.nextInt();
            int m = in.nextInt();
            int q = in.nextInt();
            int[] maxByRow = new int[n + 1];

            boolean[][] a = new boolean[n + 1][m + 1];

            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    a[i][j] = in.nextInt() == 1;
                }
            }

            for (int i = 1; i <= n; i++) {
                maxByRow[i] = findMaxInRow(a, m, i);
            }

            for (int k = 0; k < q; k++) {
                int p = in.nextInt(), l = in.nextInt();
                a[p][l] = !a[p][l];
                maxByRow[p] = findMaxInRow(a, m, p);

                out.println(findMax(maxByRow));

            }


        }

        private int findMax(int[] a) {
            return Arrays.stream(a).max().getAsInt();
        }

        private int findMaxInRow(boolean[][] a, int size, int row) {
            int max = Integer.MIN_VALUE, count = 0;
            boolean prev = false;
            for (int j = 1; j <= size; j++) {
                if (prev && a[row][j]) {
                    count++;
                } else if (!prev && a[row][j]) {
                    max = Math.max(count, max);
                    count = 1;
                } else {
                    max = Math.max(count, max);
                    count = 0;
                }
                prev = a[row][j];
            }
            return Math.max(count, max);
        }

        private long inverse(long a) {
            long result = 1;
            int n = (int) modulo - 2;
            while (n != 0) {
                if ((n & 1) == 1)
                    result = (result * a) % modulo;
                a = (a * a) % modulo;
                n >>= 1;
            }
            return result;
        }

        private long pow(long a, long n) {
            if (n == 0) return 1;
            if (n % 2 == 0) {
                long ans = pow(a, n / 2);
                return ans * ans;
            } else {
                return a * pow(a, n - 1);
            }
        }

        private void closeStreams() {
            in.close();
            out.close();
        }

        @Override
        public void run() {
            solve();
            closeStreams();
        }

        private final FastScanner in = new FastScanner();
        private final PrintWriter out = new PrintWriter(new BufferedOutputStream(System.out));
    }


    public static void main(String[] args) {
        Thread thread = new Thread(null, new Solution(), "solution", 1 << 27);
        thread.setPriority(Thread.MAX_PRIORITY);
        thread.start();
    }


    public static class FastScanner {

        private BufferedReader br;
        private StringTokenizer st;

        public FastScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

        void close() {
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}