/**
 *  Ohgas' Fortune (PKU 2683)
 *  by Kenji Inoue, 2007-01-04
 **/

#include <iostream>

using namespace std;

int main(void) {
  int N;
  cin >> N;
  while (N--) {
    int money, year, n;
    cin >> money >> year >> n;

    int max = 0;
    for (int i=0; i<n; i++) {
      int type;
      double nenri;
      int tesu;
      cin >> type >> nenri >> tesu;

      int curr = money;
      int rishi = 0;
      for (int y=0; y<year; y++) {
        if (type == 1) {
        // Fukuri (compound interest)
          curr += (int)(curr * nenri);
          curr -= tesu;
        } else {
        // Tanri (simple interest)
          rishi += (int)(curr * nenri);
          curr -= tesu;
        }
      }

      curr += rishi;
      if (curr > max) { max = curr; }
    }

    printf("%d\n", max);
  }

  return 0;
}