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#include <bits/stdc++.h>
#define PB push_back
#define ST first
#define ND second
#define _ ios_base::sync_with_stdio(0); cin.tie(0);
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

using namespace std;

using ll = long long;
using pi = pair<int,int>;
using vi = vector<int>;

const int nax = 2000 + 10;
int n,m,q;
bool t[nax][nax];
vi G[nax * nax];
bool vis[nax * nax];
int match[nax * nax];

bool path(int x) {
	vis[x] = 1;
	for(int nbh : G[x]) {
		if(match[nbh] == -1) {
			match[x] = nbh;
			match[nbh] = x;
			return 1;
		}
	}
	for(int nbh : G[x]) {
		if(!vis[match[nbh]] && path(match[nbh])) {
			match[x] = nbh;
			match[nbh] = x;
			return 1;
		}
	}
	return 0;
}

int main() {_
	cin >> n >> m >> q;
	for(int a,b,c,d,i=1; i <= m; ++i) {
		cin >> a >> b >> c >> d;
		t[a][b] ^= 1;
		t[c + 1][b] ^= 1;
		t[a][d + 1] ^= 1;
		t[c + 1][d + 1] ^= 1;
	}
	for(int i = 1; i <= n; ++i) {
		for(int j = 1; j <= n; ++j) {
			t[i][j] ^= t[i - 1][j] ^ t[i][j - 1] ^ t[i - 1][j - 1];
		}
	}
	for(int i = 1; i <= n; ++i) {
		for(int j = 1; j <= n; ++j) {
			for(int k = 1; k <= n; ++k) {
				if(k != j && t[i][k] != t[i][j]) {
					G[(i-1)*n + (j-1)].PB((i-1)*n+(k-1));
				}
				if(k != i && t[k][j] != t[i][j]) {
					G[(i - 1)*n +(j-1)].PB((k-1)*n+(j-1));
				}
			}
		}
	}
	
	int ans = 0;
	for(int i = 0; i < n * n; ++i) match[i] = -1;
	for(int i = 1; i <= n; ++i) {
		vi w = {}, b = {};
		for(int j = 1; j <= n; ++j) {
			if(t[i][j]) b.PB(j);
			else w.PB(j);
		}
		for(int j = 0; j < min((int)w.size(), (int)b.size()); ++j) {
			match[(i - 1) * n + w[j]-1] = (i - 1) * n + b[j] - 1;
			match[(i - 1) * n + b[j]-1] = (i - 1) * n + w[j] - 1;
		}
	}
	while(1) {
		for(int i = 0; i < n * n; ++i) vis[i] = 0;
		bool any = 0;
		for(int i = 0; i < n * n; ++i) {
			if(match[i] == -1 && path(i)) any = 1;
		}
		if(!any) break;
	}
	for(int i = 0; i < n * n; ++i) {
		if(match[i] != -1) ans++;
	}
	ans /= 2;
	cout << ans << "\n";
	for(int ii = 1; ii <= q; ++ii) {
		int a, b;
		cin >> a >> b;
		G[(a - 1) * n + (b - 1)].clear();
		for(int i = 1; i <= n; ++i) {
			if(i != a) {
				if(t[i][b] == t[a][b]) {
					G[(i - 1)*n+(b-1)].PB((a-1)*n+(b-1));
					G[(a-1)*n+(b-1)].PB((i-1)*n+(b-1)); 
				} else {
					int he = (i-1)*n+(b-1);
					int me = (a-1)*n+(b-1);
					for(int j = 0; j < (int)G[he].size(); ++j) {
						if(G[he][j] == me) {
							swap(G[he][j], G[he].back());
							G[he].pop_back();
							break;
						}
					}
				}
			}
			if(i != b) {
				if(t[a][i] == t[a][b]) {
					G[(a-1)*n+i-1].PB((a-1)*n+(b-1));
					G[(a-1)*n+(b-1)].PB((a-1)*n+i-1);
				} else {
					int me = (a-1)*n+(b-1);
					int he = (a-1)*n+(i-1);
					for(int j = 0; j < (int)G[he].size(); ++j) {
						if(G[he][j] == me) {
							swap(G[he][j], G[he].back());
							G[he].pop_back();
							break;
						}
					}
				}
			}
		}
		t[a][b] = 1 - t[a][b];
		int me = (a - 1) * n + (b - 1), he = -1;
		if(match[me] != -1) {
			ans--;
			he = match[me];
			match[match[me]] = -1;
			match[me] = -1;
		}
		while(1) {
			for(int i = 0; i < n * n; ++i) vis[i] = 0;
			bool any = 0;
			for(int i = 0; i < n * n; ++i) {
				if(match[i] == -1 && path(i)) {
					any = 1;
					ans++;
					break;
				}
			}
			if(!any) break;
		}
		cout << ans << "\n";	
	}
	
}