#include <iostream>
#include <algorithm>

#ifdef max
#undef max
#endif

using namespace std;

int
main()
{
  int case_number;
  cin >> case_number;
  for (int case_count = 0; case_count != case_number; ++case_count){
    int start, year, kind;
    long long temp_max = -1;
    cin >> start >> year >> kind;
    for (int i = 0; i < kind; ++i){
      int type, h;
      long double r;
      cin >> type >> r >> h;
      long long money = start;
      if (type == 1){
        for (int j = 0; j < year; ++j){
          money = money + (long long)((long double)money * r) - h;
        }
      } else {
        long long t = 0;
        for (int j = 0; j < year; ++j){
          t += (long long)((long double)money * r);
          money -= h;
        }
        money += t;
      }
      //cout << money << " " << type << endl;
      temp_max = max(temp_max, money);
    }
    cout << temp_max << endl;
    //cout << endl;
  }
  return 0;
}