func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int r, d;     cin >> r >> d;     int n;     cin >> n;     d = r - d;     int ans = 0;     for (int i = 0; i < n; i++) {       int x, y, rx;       cin >> x >> y >> rx;       long double distance = sqrt(x * x + y * y);       long double temp = (rx);       if (distance - d - temp >= 0) {         if (r - distance - temp >= 0) ans++;       }     }     cout << ans;     return 0;   }   