#include <iostream>
#include <algorithm>
using namespace std;
int main(){
  int m;
  cin >> m;
  for(int i = 0; i < m; i++){
    int init;
    int year;
    int n;
    int a;
    double rate;
    int money;
    cin >> init >> year >> n;
    int Max = 0;
    for(int j = 0; j < n; j++){
      int a;
      cin >> a >> rate >> money;
      if(a == 0){
	int s = init * rate;
	//Max = max(Max, (int)(init - (s - money) * year));
	int remain = 0;
	int current = init;
	for(int k = 0; k < year; k++){
	  remain += (current * (rate));
	  current = current - money;
	}
	Max = max(Max, current + remain);
      }else{
	int current = init;
	for(int k = 0; k < year; k++){
	  current = current * (1 + rate) - money;
	}
	Max = max(Max, current);
      }
    }
    cout << Max << endl;
  }
}