#include <bits/stdc++.h>   using namespace std;   vector<int> t;   int n, x, i, j, h, sol, temp;   int main() {     ios::sync_with_stdio(false);     cin >> n;     for (i = 0; i < n; i++) {       cin >> x;       t.push_back(x);     }     cin >> h;     sort(t.begin(), t.end());     sol = 0;     for (i = 0; i < n; i++) {       temp = 1;       for (j = i + 1; j < n; j++) {         if (t[j] - t[i] <= h) temp++;       }       sol = max(sol, temp);     }     cout << sol << endl;     return 0;   }   