func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long t, n, r;     cin >> t;     while (t--) {       cin >> n >> r;       vector<long long> v(n);       set<long long> s;       for (int i = 0; i < n; i++) {         cin >> v[i];         s.insert(v[i]);       }       vector<long long> a;       for (auto i : s) {         a.push_back(i);       }       int co = 0;       long long cur = 0;       for (int i = a.size() - 1; i >= 0; i--) {         if (a[i] - cur > 0) {           a[i] = 0;           co++;           cur += r;         } else           break;       }       cout << co << endl;     }     return 0;   }   