#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
//#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;

#define pb push_back

typedef long long ll;
typedef double ld;
int n, m;
const int maxN = 205;
int cnt_other[4 * maxN];
int info[4 * maxN][maxN][2];
int tp[maxN][maxN];
int q;
int par[4 * maxN];
int get(int x) {
    if (x == par[x]) return x;
    return par[x] = get(par[x]);
}
void unite(int a, int b) {
    a = get(a);
    b = get(b);
    if (a == b) return;
    par[a] = b;
}
bool was[4 * maxN];
int MP[4 * maxN];
void merge(int v, int l, int mid, int r) {
    cnt_other[v] = cnt_other[2 * v] + cnt_other[2 * v + 1];
    int SZ1 = 0;
    for (int x = 1; x <= m; x++) {
        SZ1 = max(SZ1, info[2 * v][x][0]);
        SZ1 = max(SZ1, info[2 * v][x][1]);
    }
    SZ1++;
    int SZ2 = 0;
    for (int x = 1; x <= m; x++) {
        SZ2 = max(SZ2, info[2 * v + 1][x][0]);
        SZ2 = max(SZ2, info[2 * v + 1][x][1]);
    }
    SZ2++;
    for (int u = 0; u < SZ1 + SZ2; u++) {
        par[u] = u;
    }
    for (int x = 1; x <= m; x++) {
        if (tp[mid][x] == tp[mid + 1][x]) {
            unite(info[2 * v][x][1], info[2 * v + 1][x][0] + SZ1);
        }
    }
    for (int x = 1; x <= m; x++) {
        was[get(info[2 * v][x][0])] = true;
        was[get(info[2 * v + 1][x][1])] = true;
    }
    int sz = 0;
    for (int u = 0; u < SZ1 + SZ2; u++) {
        if (get(u) == u) {
            if (!was[u]) {
                cnt_other[v]++;
            }
            else {
                MP[u] = sz;
                sz++;
            }
        }
    }
    for (int x = 1; x <= m; x++) {
        info[v][x][0] = MP[get(info[2 * v][x][0])];
        info[v][x][1] = MP[get(info[v][x][1])];
    }
}
void build(int v, int tl, int tr) {
    if (tl == tr) {
        cnt_other[v] = 0;
        int sz = 0;
        for (int j = 1; j <= m; j++) {
            if (j == 1 || tp[tl][j] != tp[tl][j - 1]) {
                info[v][j][0] = info[v][j][1] = sz;
                sz++;
            }
            else {
                info[v][j][0] = info[v][j][1] = info[v][j - 1][0];
            }
        }
        return;
    }
    int tm = (tl + tr) / 2;
    build(2 * v, tl, tm);
    build(2 * v + 1, tm + 1, tr);
    merge(v, tl, tm, tr);
}
int calc() {
    int SZ = 0;
    for (int i = 1; i <= m; i++) {
        SZ = max(SZ, info[1][i][0]);
        SZ = max(SZ, info[1][i][1]);
    }
    return SZ + 1 + cnt_other[1];
}
void upd(int v, int tl, int tr, int pos) {
    if (tl == tr) {
        cnt_other[v] = 0;
        int sz = 0;
        for (int j = 1; j <= m; j++) {
            if (j == 1 || tp[tl][j] != tp[tl][j - 1]) {
                info[v][j][0] = info[v][j][1] = sz;
                sz++;
            }
            else {
                info[v][j][0] = info[v][j][1] = info[v][j - 1][0];
            }
        }
        return;
    }
    int tm = (tl + tr) / 2;
    if (pos <= tm) {
        upd(2 * v, tl, tm, pos);
    }
    else {
        upd(2 * v + 1, tm + 1, tr, pos);
    }
    merge(v, tl, tm, tr);
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#ifdef DEBUG
    freopen("input.txt", "r", stdin);
#endif
    cin >> n >> m >> q;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            char c;
            cin >> c;
            if (c == '1') tp[i][j] = 1;
        }
    }
    build(1, 1, n);
    int op = calc();
    while (q--) {
        int x, y;
        cin >> x >> y;
        x ^= op;
        y ^= op;
        tp[x][y] ^= 1;
        upd(1, 1, n, x);
        op = calc();
        cout << op << '\n';
    }
    return 0;
}