1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
#include <bits/stdc++.h>

#define DEBUG(x) cout << '>' << #x << ':' << x << endl;
#define fi first
#define se second
#define ll long long
#define ld long double
#define pb push_back
#define vi vector<int>
#define pi pair<int, int>
#define MAXN 100001

using namespace std;

int count(vector<vector<bool>> &A) {
    int res = 0;
    for (int i = 0; i < A.size(); i++) {
        for (int j = 0; j < A[i].size(); j++) {
            if (A[i][j])
                res++;
            cout << A[i][j] << " ";
        }
        cout << endl;
    }

    return res;
}

int gidx(int x, int y, int n) {
    return x * n + y;
}

pi rgidx(int idx, int n) {
    return make_pair(idx / n, idx % n);
}

void make_graph(vector<vector<bool>> &A, vector<vi> &V, vi &M, vector<bool> &B, bool f) {
    int n = A.size();

    for (int x = 0; x < n; x++) {
        for (int y = 0; y < n; y++) {
            int idx = gidx(x, y, n);

            if (f) {
                V[idx].clear();
                M[idx] = -1;
                B[idx] = false;
            }

            if (!A[x][y])
                continue;

            for (int i = 0; i < n; i++) {
                if (!A[i][y]) {
                    int ne = gidx(i, y, n);
                    V[idx].pb(ne);
                    V[ne].pb(idx);
                }
                if (!A[x][i]) {
                    int ne = gidx(x, i, n);
                    V[idx].pb(ne);
                    V[ne].pb(idx);
                }
            }
        }
    }
}

bool dfs(int x, int p, vector<vi> &V, vi &M, vector<bool> &B) {
    if (B[x])
        return false;

    B[x] = true;
    for (int i = 0; i < V[x].size(); i++) {
        int y = V[x][i];
        if (y != p && (M[y] == -1 || dfs(M[y], y, V, M, B) == true)) {
            M[x] = y;
            M[y] = x;
            return true;
        }
    }
    return false;
}

int matching(int n, vector<vector<bool>> &A, vector<vi> &V, vi &M, vector<bool> &B) {
    bool c = true;

    while (c) {
        c = false;
        fill(B.begin(), B.end(), false);

        for (int i = 0; i < n * n; i++)
            if (M[i] == -1 && !B[i])
                c = max(dfs(i, -1, V, M, B), c);
    }

    int counter = 0;
    for (int i = 0; i < n * n; i++) {
        pi xy = rgidx(i, n);
        if (A[xy.fi][xy.se] && M[i] != -1)
            counter++;
    }
    return counter;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, m, q;
    cin >> n >> m >> q;

    vector<vector<bool>> A(n);
    for (int i = 0; i < n; i++) {
        A[i].resize(n);
        fill(A[i].begin(), A[i].end(), false);
    }

    int x1, x2, y1, y2;
    for (int i = 0; i < m; i++) {
        cin >> x1 >> y1 >> x2 >> y2;

        for (int x = x1 - 1; x < x2; x++) {
            for (int y = y1 - 1; y < y2; y++) {
                A[x][y] = !A[x][y];
            }
        }
    }

    vector<vi> V(n * n);
    vi M(n * n);
    vector<bool> B(n * n);

    make_graph(A, V, M, B, true);

    int c = matching(n, A, V, M, B);
    cout << c << endl;

    // for (int x = 0; x < n; x++) {
    //     for (int y = 0; y < n; y++) {
    //         cout << A[x][y] << " ";
    //     }
    //     cout << endl;
    // }

    //  for (int x = 0; x < n; x++) {
    //     for (int y = 0; y < n; y++) {
    //         cout << M[gidx(x, y, n)] << " ";
    //     }
    //     cout << endl;
    // }

    for (int i = 0; i < q; i++) {
        cin >> x1 >> y1;
        x1--;
        y1--;

        A[x1][y1] = !A[x1][y1];
        int idx = gidx(x1, y1, n);

		B[idx] = false;
        if (M[idx] != -1) {
            int mate = M[idx];
            M[idx] = M[mate] = -1;
			 B[mate] = false;
        }

		make_graph(A, V, M, B, false);

        cout << matching(n, A, V, M, B) << endl;
    }

    return 0;
}