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:
//package codeforcesround.year2015.may.round305;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.StringTokenizer;
 
public class MikeAndFun {
        BufferedReader br;
        PrintWriter out;
        StringTokenizer tk;
        boolean submit;
        
        private String ntk() { 
                while (tk == null || !tk.hasMoreTokens()) {
                        try {
                                tk = new StringTokenizer(br.readLine());
                        } catch (IOException e) {
                                return null;
                        }
                }
                return tk.nextToken();
        }
 
        private String nln() {
                try {
                        return br.readLine();
                } catch (IOException e) {
                        return null;
                }
        }
        
        private String ns() { 
                return ntk(); 
        }
 
        private int ni() throws IOException {
                return Integer.parseInt(ntk());
        }
        
        private long nl() throws IOException {
                return Long.parseLong(ntk());
        }
        
        private float nf() throws IOException {
                return Float.parseFloat(ntk());
        }
        
        private double nd() throws IOException {
                return Double.parseDouble(ntk());
        }
        
        private void debug(Object... o) {
                if(!submit) {
                        System.out.println(Arrays.deepToString(o));
                }
        }
 
        public static void main(String args[]) throws IOException {
                new MikeAndFun();
        }
        
        public MikeAndFun() throws IOException {
                long start = System.currentTimeMillis();
                submit = !false;
                if(submit == false) br = new BufferedReader(new InputStreamReader(new FileInputStream("D:\\input.txt")));
                else br = new BufferedReader(new InputStreamReader(System.in));
                out = new PrintWriter(System.out);
                
                int t = 1; 
                while(t-- > 0)
                        solve();
                
                long end = System.currentTimeMillis();
                debug(end - start, " ms");
                out.close();
        }
        
        int N, M, Q;
        boolean map[][];
        int rowCount[];
        private void solve() throws IOException {
                N = ni(); M = ni(); Q = ni();
                map = new boolean[N][M];
                rowCount = new int[N];
                for(int i = 0; i < N; i++) {
                        for(int j = 0; j < M; j++) {
                                int n = ni();
                                if(n == 1) {
                                        map[i][j] = true;
                                }
                        }
                }
                build();
                for(int i = 0; i < Q; i++) {
                        int u = ni(), v = ni();
                        u--; v--;
                        map[u][v] = !map[u][v];
                        update(u);
                        int ans = findMax();
                        out.println(ans);
                }
        }

        private void build() {
                for(int i = 0; i < N; i++) {
                        int cs = 0, mcs = 0;
                        for(int j = 0; j < M; j++) {
                                if(map[i][j]) {
                                        cs++;
                                } else {
                                        mcs = Math.max(mcs, cs);
                                        cs = 0;
                                }
                        }
                        mcs = Math.max(mcs, cs);
                        rowCount[i] = mcs;
                }
        }

        private int findMax() {
                int max = Integer.MIN_VALUE;
                int ans = -1;
                for(int i = 0; i < N; i++) {
                        if(rowCount[i] > max) {
                                max = rowCount[i];
                                ans = i;
                        }
                }
                return max;
        }

        private void update(int i) {
                int cs = 0, mcs = 0;
                for (int j = 0; j < M; j++) {
                        if (map[i][j]) {
                                cs++;
                        } else {
                                mcs = Math.max(mcs, cs);
                                cs = 0;
                        }
                }
                mcs = Math.max(mcs, cs);
                rowCount[i] = mcs;
        }
}