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.

<image>

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.math.BigInteger;
import java.util.*;

public class Stack2 {

    static class Reader {
        final private int BUFFER_SIZE = 1 << 16;
        private DataInputStream din;
        private byte[] buffer;
        private int bufferPointer, bytesRead;

        public Reader() {
            din = new DataInputStream(System.in);
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public Reader(String file_name) throws IOException {
            din = new DataInputStream(new FileInputStream(file_name));
            buffer = new byte[BUFFER_SIZE];
            bufferPointer = bytesRead = 0;
        }

        public String readLine() throws IOException {
            byte[] buf = new byte[64]; // line length
            int cnt = 0, c;
            while ((c = read()) != -1) {
                if (c == '\n')
                    break;
                buf[cnt++] = (byte) c;
            }
            return new String(buf, 0, cnt);
        }

        public int nextInt() throws IOException {
            int ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            } while ((c = read()) >= '0' && c <= '9');
            if (neg)
                return -ret;
            return ret;
        }

        public long nextLong() throws IOException {
            long ret = 0;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');
            if (neg)
                return -ret;
            return ret;
        }

        public double nextDouble() throws IOException {
            double ret = 0, div = 1;
            byte c = read();
            while (c <= ' ')
                c = read();
            boolean neg = (c == '-');
            if (neg)
                c = read();
            do {
                ret = ret * 10 + c - '0';
            }
            while ((c = read()) >= '0' && c <= '9');
            if (c == '.') {
                while ((c = read()) >= '0' && c <= '9') {
                    ret += (c - '0') / (div *= 10);
                }
            }
            if (neg)
                return -ret;
            return ret;
        }

        private void fillBuffer() throws IOException {
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
            if (bytesRead == -1)
                buffer[0] = -1;
        }

        private byte read() throws IOException {
            if (bufferPointer == bytesRead)
                fillBuffer();
            return buffer[bufferPointer++];
        }

        public void close() throws IOException {
            if (din == null)
                return;
            din.close();
        }
    }

    static Reader sc = new Reader();
    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

    public static void main(String[] args) throws IOException {
        /*
         * For integer input: int n=inputInt();
         * For long input: long n=inputLong();
         * For double input: double n=inputDouble();
         * For String input: String s=inputString();
         * Logic goes here
         * For printing without space: print(a+""); where a is a variable of any datatype
         * For printing with space: printSp(a+""); where a is a variable of any datatype
         * For printing with new line: println(a+""); where a is a variable of any datatype
         */
        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        int m=sc.nextInt();
        int q=sc.nextInt();
        int[][] ar=new int[n+1][m+1];
        for(int i=1;i<=n;i++){
            for(int j=1;j<=m;j++){
                ar[i][j]=sc.nextInt();
            }
        }
        long[] dp=new long[n+1];
        long maxans=0;
        for(int i=1;i<=n;i++){
            long maxc=0;
            long count=0;
            for(int j=1;j<=m;j++){
                if(ar[i][j]==1){
                    count++;
                }else {
                    maxc=Math.max(maxc,count);
                    count=0;

                }
            }
            maxc=Math.max(maxc,count);
            dp[i]=maxc;
            maxans=Math.max(dp[i],maxans);

        }

        for(int j=0;j<q;j++){
            int x=sc.nextInt();
            int y=sc.nextInt();
          //  System.out.println(Arrays.toString(ar[x]));
            ar[x][y]=1-ar[x][y];
          //  System.out.println(Arrays.toString(ar[x]));
            long maxc=0;
            long count=0;
            for(int p=1;p<=m;p++){
                if(ar[x][p]==1){
                    count++;
                }else {
                    maxc=Math.max(maxc,count);
                    count=0;
                }
            }
            maxc=Math.max(maxc,count);
            dp[x]=maxc;
          //  maxans=Math.max(dp[x],maxans);
            maxans=0;
            for(int p=1;p<=n;p++){
                maxans=Math.max(dp[p],maxans);
            }
            System.out.println(maxans);

        }

        bw.flush();
        bw.close();


    }

    public static long getAns(int v1, int v2, int t, int d, int prev1, int prev2) {
        if (t <= 0) {
            return 0;
        }
        if (t == 1) {
            int max = Math.max(v1, v2);
            int min = Math.min(v1, v2);
            if (Math.abs(prev1 - max) <= d && Math.abs(prev2 - max) <= d) {
                return max;
            } else {
                return min;
            }
        }
        if (Math.abs(v1 - v2) <= d) {
            return (v1 + v2) + getAns(v1 + d, v2 + d, t - 2, d, v1, v2);
        } else {
            return (v1 + v2) + getAns(v1 + d, v2 - d, t - 2, d, v1, v2);
        }


    }


    public static void bfs(int r, int c, Queue<int[]> queue, long[][] dis, char[][] map, boolean[][] visited) {
        while (!queue.isEmpty()) {
            int[] ar = queue.poll();
            int x = ar[0];
            int y = ar[1];
            if (x + 1 < r) {
                if (map[x + 1][y] != 'T' && dis[x + 1][y] > (dis[x][y] + 1)) {
                    dis[x + 1][y] = Math.min(dis[x + 1][y], (dis[x][y] + 1));
                    queue.add(new int[]{x + 1, y});
                } /*else if (map[x][y] != map[x + 1][y] && dis[x + 1][y] > (dis[x][y] + 1)) {
                    dis[x + 1][y] = Math.min(dis[x + 1][y], dis[x][y] + 1);
                    queue.add(new int[]{x + 1, y});
                }*/
              /*  if(!visited[x+1][y] ){
                    queue.add(new int[]{x + 1, y});
                    visited[x+1][y]=true;
                }*/


            }
            if (y + 1 < c) {
                if (map[x][y + 1] != 'T' && dis[x][y + 1] > (dis[x][y] + 1)) {
                    dis[x][y + 1] = Math.min(dis[x][y + 1], dis[x][y] + 1);
                    queue.add(new int[]{x, y + 1});
                } /*else if (map[x][y] != map[x][y + 1] && dis[x][y + 1] > (dis[x][y] + 1)) {
                    dis[x][y + 1] = Math.min(dis[x][y + 1], dis[x][y] + 1);
                    queue.add(new int[]{x, y + 1});
                }*/
               /* if( !visited[x][y+1]){
                    queue.add(new int[]{x, y+1});
                    visited[x][y+1]=true;
                }*/


            }
            if (x - 1 >= 0) {
                if (map[x - 1][y] != 'T' && dis[x - 1][y] > (dis[x][y] + 1)) {
                    dis[x - 1][y] = Math.min(dis[x - 1][y], (dis[x][y] + 1));
                    queue.add(new int[]{x - 1, y});
                } /*else if (map[x][y] != map[x - 1][y] && dis[x - 1][y] > (dis[x][y] + 1)) {
                    dis[x - 1][y] = Math.min(dis[x - 1][y], dis[x][y] + 1);
                    queue.add(new int[]{x - 1, y});
                }*/
               /* if(!visited[x-1][y]){
                    queue.add(new int[]{x - 1, y});
                    visited[x-1][y]=true;
                }*/


            }
            if (y - 1 >= 0) {
                if (map[x][y - 1] != 'T' && dis[x][y - 1] > (dis[x][y] + 1)) {
                    dis[x][y - 1] = Math.min(dis[x][y - 1], (dis[x][y] + 1));
                    queue.add(new int[]{x, y - 1});
                } /*else if (map[x][y] != map[x][y - 1] && dis[x][y - 1] > (dis[x][y] + 1)) {
                    dis[x][y - 1] = Math.min(dis[x][y - 1], dis[x][y] + 1);
                    queue.add(new int[]{x, y - 1});
                }*/
               /* if(!visited[x][y-1]){
                    queue.add(new int[]{x , y-1});
                    visited[x][y-1]=true;
                }*/


            }
        }
    }


    public static void dfs1(List<List<Integer>> g, boolean[] visited, Stack<Integer> stack, int num) {
        visited[num] = true;
        for (Integer integer : g.get(num)) {
            if (!visited[integer]) {
                dfs1(g, visited, stack, integer);
            }
        }
        stack.push(num);
    }

    public static void dfs2(List<List<Integer>> g, boolean[] visited, List<Integer> list, int num, int c, int[] raj) {
        visited[num] = true;

        for (Integer integer : g.get(num)) {
            if (!visited[integer]) {
                dfs2(g, visited, list, integer, c, raj);
            }
        }
        raj[num] = c;
        list.add(num);

    }

    public static int inputInt() throws IOException {
        return sc.nextInt();
    }

    public static long inputLong() throws IOException {
        return sc.nextLong();
    }

    public static double inputDouble() throws IOException {
        return sc.nextDouble();
    }

    public static String inputString() throws IOException {
        return sc.readLine();
    }

    public static void print(String a) throws IOException {
        bw.write(a);
    }

    public static void printSp(String a) throws IOException {
        bw.write(a + " ");
    }

    public static void println(String a) throws IOException {
        bw.write(a + "\n");
    }


    public static long getAns(int[] ar, int c, long[][] dp, int i, int sign) {
        if (i < 0) {
            return 1;
        }

        if (c <= 0) {
            return 1;
        }

        dp[i][c] = Math.max(dp[i][c], Math.max(ar[i] * getAns(ar, c - 1, dp, i - 1, sign), getAns(ar, c, dp, i - 1, 1)));
        return dp[i][c];
    }


    public static long power(long a, long b, long c) {
        long ans = 1;
        while (b != 0) {
            if (b % 2 == 1) {
                ans = ans * a;
                ans %= c;
            }
            a = a * a;
            a %= c;
            b /= 2;
        }
        return ans;
    }

    public static long power1(long a, long b, long c) {
        long ans = 1;
        while (b != 0) {
            if (b % 2 == 1) {
                ans = multiply(ans, a, c);
            }
            a = multiply(a, a, c);
            b /= 2;

        }
        return ans;

    }

    public static long multiply(long a, long b, long c) {
        long res = 0;
        a %= c;
        while (b > 0) {
            if (b % 2 == 1) {
                res = (res + a) % c;
            }
            a = (a + a) % c;
            b /= 2;
        }

        return res % c;

    }

    public static long totient(long n) {
        long result = n;
        for (long i = 2; i * i <= n; i++) {
            if (n % i == 0) {
                //sum=sum+2*i;
                while (n % i == 0) {
                    n /= i;
                    // sum=sum+n;
                }
                result -= result / i;

            }
        }
        if (n > 1) {
            result -= result / n;

        }
        return result;
    }


    public static long gcd(long a, long b) {
        if (b == 0) {
            return a;
        } else {
            return gcd(b, a % b);
        }
    }

    public static boolean[] primes(int n) {
        boolean[] p = new boolean[n + 1];
        p[0] = false;
        p[1] = false;
        for (int i = 2; i <= n; i++) {
            p[i] = true;
        }

        for (int i = 2; i * i <= n; i++) {
            if (p[i]) {
                for (int j = i * i; j <= n; j += i) {
                    p[j] = false;
                }
            }

        }
        return p;
    }

    static void bogoSort(int[] a, int c) {
        // if array is not sorted then shuffle the
        // array again
        while (isSorted(a) == false) {
            c++;
            shuffle(a);
        }

    }

    // To generate permuatation of the array
    static void shuffle(int[] a) {
        // Math.random() returns a double positive
        // value, greater than or equal to 0.0 and
        // less than 1.0.
        for (int i = 1; i <= a.length; i++)
            swap(a, i, (int) (Math.random() * i));
    }

    // Swapping 2 elements
    static void swap(int[] a, int i, int j) {
        int temp = a[i];
        a[i] = a[j];
        a[j] = temp;
    }

    // To check if array is sorted or not
    static boolean isSorted(int[] a) {
        for (int i = 1; i < a.length; i++)
            if (a[i] < a[i - 1])
                return false;
        return true;
    }

}