#include <iostream>
#include <string>
using namespace std;

int main (int argc, char ** argv){
  int g,n;
  int max=0;
  string strmax= "";
  int tmp2;
  cin >> g >> n;
  string a;
  int prixp;
  int prix;
  for (int i =0; i < n; i ++){
    cin >> a >> prixp >> prix;
    int tmp = g;
    tmp = tmp - prix;
    tmp = tmp/prixp;
    if (tmp > max){
      max=tmp;
      strmax= a;
    }
  }
  if (max == 0){
    cout << "Impossible"<<endl;
  }
  else {
    cout<<max<<endl;
    cout<<strmax;
  }
return 0;
}