import java.util.Scanner;

public class TankTask {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        double experience = Double.parseDouble(scan.nextLine());
        int countOfBattles  = Integer.parseInt(scan.nextLine());

        int counter =0;

        double earnedXp =0;


        for (int i = 1; i <=countOfBattles ; i++) {


            if(earnedXp>=experience) {
                System.out.printf("Player successfully collected his needed experience for %d battles.",counter);
                return;
            }
            double xpPerBattle = Double.parseDouble(scan.nextLine());


            if(i%3!=0&&i%5!=0){
                earnedXp+=xpPerBattle;
                counter++;

            }else if(i%3==0){
                earnedXp+=xpPerBattle*1.15;
                counter++;


            }else {
                earnedXp+=xpPerBattle*0.9;
                counter++;
            }
        }

        if(experience>earnedXp){
            double diff = experience-earnedXp;
            System.out.printf("Player was not able to collect the needed experience, %.2f more needed.",diff);
        }else  if(earnedXp>experience) {
            System.out.printf("Player successfully collected his needed experience for %d battles.",counter);

        }



    }
}