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#pragma GCC optimize ("Ofast")
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i=(a); i<(b); i++)
#define FORD(i, a, b) for (int i=(a); i>(b); i--)
#define PPC(x) __builtin_popcount(x)
#define MSB(x) (63 - __builtin_clzll(x))
#define SZ(x) ((int)(x).size())
#define HASK(S, x) (S.find(x) != S.end())
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define ithBit(m, i) ((m) >> (i) & 1)
#define ft first
#define sd second
#define kw(a) ((a) * (a))
#ifdef DEBUG
#include "debug.h"
#else
#define dbg(...) 0
#endif
using namespace std; 

template <typename T1, typename T2> inline void remin(T1& a, T2 b) { a = min(a, (T1)b);	}
template <typename T1, typename T2> inline void remax(T1& a, T2 b) { a = max(a, (T1)b);	}

const int maxN = 1 << 23, maxD = 1 << 11;

namespace Matching
{
    int *part, n, m, visctr, ser, dist[maxN], vis[maxN];
    int qb, Q[maxN];
    vector <int>* G;
	void ins(int v, int d)
	{
		dist[v] = d; vis[v] = visctr;
		if (d <= ser)	Q[qb++] = v;
	}	
    bool bfs(const vector <int>& hint = {})
    {
        visctr++;
        ser = n + m; qb = 0;
        if (hint.empty())
        {
        	FOR(i, 1, n+1)
        		if (part[i] == 0)
        			ins(i, 0);
        }
        else for (int v : hint)
        	if (part[v] == 0)
        			ins(v, 0);
        for (int qf = 0; qf != qb; qf++)
        {
            int v = Q[qf];
            for (int w : G[v])
            {
                int u = part[w];
                if (vis[u] == visctr)	continue;
                if (u == 0)
                {	ser = min(ser, dist[v]+1);	continue;	}
				ins(u, dist[v] + 2);
            }
        }
        visctr++;	return ser != n + m;
    }
    void match(int a, int b)	{ part[a] = b, part[b] = a;	}
    bool dfs(int v)
    {
        vis[v] = visctr;
        if (dist[v] > ser)	return false;
        for (int w : G[v])
        {
            int u = part[w];
            if (u == 0 or
            (vis[u] != visctr and dist[u] == dist[v] + 2 and dfs(u)))
            {	match(w, v); return true;	}
        }
        return false;
    }
    int run(vector <int>* Gin, int nn, int mm, int* partout, const vector <int>& hint = {})
    {
        G = Gin; n = nn; m = mm; part = partout;
    	bfs(hint);
    	for (int v : hint)
    		if (part[v] == 0)
				dfs(v);
        while (bfs())  FOR(i, 1, n+1)
			if (part[i] == 0) dfs(i);
		int ret = 0;
        FOR(i, 1, n+1)	ret += part[i] != 0;
        return ret;
    }
};

int rect[maxD][maxD], suf[maxD][maxD], mp[maxD][maxD], part[maxN];
vector <int> G[maxN];

void flip(int i, int j)
{	rect[i][j] ^= 1;	}

void conn(int i, int j)
{	G[i].pb(j), G[j].pb(i);	}

void ers(vector <int>& t, int x)
{
	for (int& v : t) if (v == x)
	{
		swap(t.back(), v);
		t.pop_back();
		break;
	}
}

void solve()
{
	int n, m, q;
	scanf ("%d%d%d", &n, &m, &q);
	
	while (m--)
	{
		int a, b, c, d;
		scanf ("%d%d%d%d", &a, &b, &c, &d);
		flip(a-1, b-1);
		flip(a-1, d);
		flip(c, b-1);
		flip(c, d);
	}
	
	FORD(i, n, 0) FORD(j, n, 0)
		suf[i][j] = suf[i+1][j] ^ suf[i][j+1] ^ suf[i+1][j+1] ^ rect[i][j];
		
	int k = 0;
	FOR(i, 1, n+1) FOR(j, 1, n+1)
	{
		mp[i][j] = ++k;
		if (suf[i][j])
			mp[i][j] += n*n;
	}
	
	FOR(i, 1, n+1) FOR(j1, 1, n+1) FOR(j2, 1, j1)
		if (suf[i][j1] != suf[i][j2])
			conn(mp[i][j1], mp[i][j2]);
		
	FOR(j, 1, n+1) FOR(i1, 1, n+1) FOR(i2, 1, i1)
		if (suf[i1][j] != suf[i2][j])
			conn(mp[i1][j], mp[i2][j]);
			
	int res = Matching::run(G, k, k, part);
	printf("%d\n", res);
	
	while (q--)
	{
		int i, j;
		scanf ("%d%d", &i, &j);
		int old = mp[i][j], nw = old <= k ? old + k : old - k;
		
		FOR(j2, 1, n+1) if (j2 != j)
		{
			int v = mp[i][j2];
			if ((v <= k) xor (old <= k))
				ers(G[v], old);
			else
				conn(v, nw);
		}
		FOR(i2, 1, n+1) if (i2 != i)
		{
			int v = mp[i2][j];
			if ((v <= k) xor (old <= k))
				ers(G[v], old);
			else
				conn(v, nw);
		}
		G[old].resize(0);
		vector <int> hint = {nw};
		if (part[old] != 0)
		{
			hint.pb(part[old]);
			part[part[old]] = 0;
			part[old] = 0;
			res--;
		}
		mp[i][j] = nw;
		res = Matching::run(G, k, k, part, hint);
		printf("%d\n", res);
	}
/*	
	dbg(res);
	FOR(i, 1, n+1)
	{
		FOR(j, 1, n+1)
		{
			char c = '_';
			int v = mp[i][j];
			if (part[v] == 0)
				c = v <= k ? '.' : '#';
			printf("%c", c);
		}
		printf("\n");
	}
*/
}
 
int main()
{
	int t = 1;
	//scanf ("%d", &t);
	FOR(tid, 1, t+1)
	{
		//printf("Case #%d: ", tid);
		solve();
	}
	return 0;
}