#include <cstdio>
#include <cstdlib>

#define fr(i, a, b) for(int i=a; i<b; ++i)
#define INF INT_MAX;

int n, dx, dy;
int x[500000];
int y[500000];
int minx = 0, miny = 0;
int maxx = 50000, maxy = 50000;
int ddx, ddy, hatar;

int main()
{
	freopen("tribute.in", "r", stdin);
	freopen("tribute.out", "w", stdout);

	scanf("%d%d%d", &n, &dx, &dy);
	fr(i, 0, n) { scanf("%d%d", &x[i], &y[i]); if (x[i]<minx) minx = x[i]; if (x[i]>maxx) maxx = x[i]; if (y[i]<miny) minx = y[i]; if (y[i]>maxy) maxx = y[i]; }

	ddx = maxx-minx;
	ddy = maxy-miny;
	hatar = ddx-dx+1;
	minx = INF;
	fr(i, 0, hatar)
	{
		maxx = 0;
		fr(j, 0, n)
		{
			if (x[j]<i) maxx += i-x[j];
			else if (x[j]>i+dx) maxx += x[j]-dx-i;
		}
		if (maxx < minx) minx = maxx;
	}
	hatar = ddy-dy+1;
	miny = INF;
	fr(i, 0, hatar)
	{
		maxy = 0;
		fr(j, 0, n)
		{
			if (y[j]<i) maxy += i-y[j];
			else if (y[j]>i+dy) maxy += y[j]-dy-i;
		}
		if (maxy < miny) miny = maxy;
	}

	printf("%d", minx+miny);
	return 0;
}