#include<stdio.h>#include<string.h>int main(){ int n, p[100][100], r[100][100]; while (scanf("%d", &n), n) { int w, h, s, t, i, j, k, l; memset(p, 0, 100 * 100 * sizeof(int)); memset(r, 0, 100 * 100 * sizeof(int)); scanf("%d %d", &w, &h); for (i = 0; i < n; i++) { scanf("%d %d", &s, &t); p[t][s] = 1; } scanf("%d %d", &s, &t); for (i = 1; i <= h; i++) for (j = 1; j <= w; j++) if (p[i][j]) { for (k = i - t + 1; k <= i; k++) for (l = j - s + 1; l <= j; l++) if (k > 0 && l > 0) r[k][l]++; } int max = -1; for (i = 1; i <= h; i++) for (j = 1; j <= w; j++) if (r[i][j] > max) max = r[i][j]; printf("%dn", max); } return 0;}
