public class MyClass {
    public static void main(String args[]) {
        double neededExperience = 0.0;
        int numberOfBattles = 0;
        double experienceEarned = 0.0;
        double experienceGainedPerBattle = 0.0;
        double totalExperience = 0.0;

        java.util.Scanner scanner = new java.util.Scanner(System.in);

        neededExperience = Double.parseDouble(scanner.nextLine());
        numberOfBattles = Integer.parseInt(scanner.nextLine());

        for(int battleNumber = 1;battleNumber <= numberOfBattles;battleNumber++) {
            experienceGainedPerBattle = Integer.parseInt(scanner.nextLine());
            if (battleNumber % 3 == 0 && battleNumber % 15 != 0) {
                totalExperience += (experienceGainedPerBattle * 1.15);
            }
            else if (battleNumber % 5 == 0 && battleNumber % 15 != 0) {
                totalExperience += (experienceGainedPerBattle * 0.9);
            }
            else if (battleNumber % 15 == 0) {
                totalExperience += (experienceGainedPerBattle * 1.05);
            } else {
                 totalExperience += experienceGainedPerBattle;
            }
            if (experienceCheck(totalExperience,neededExperience)) {
                System.out.printf("Player successfully collected his needed experience for %d battles.",battleNumber);
                break;
            }
        }
        if (!experienceCheck(totalExperience,neededExperience)) {
            System.out.printf("Player was not able to collect, %.2f more needed.",neededExperience - totalExperience);
        }
    }
    public static boolean experienceCheck(double gainedExperience, double neededExperience) {
        return gainedExperience >= neededExperience;
    }
}