problem 1

exp_needed = float(input())
battles = int(input())

exp_collected = 0
battles_counter = 0

for i in range(1, battles + 1):
    exp_earned_per_battle = float(input())
    battles_counter += 1
    exp_earned_for_current_battle = exp_earned_per_battle
    if i % 3 == 0:
        exp_earned_for_current_battle *= 1.15
    if i % 5 == 0:
        exp_earned_for_current_battle *= 0.9
    if i % 15 == 0:
        exp_earned_for_current_battle *= 1.05
    exp_collected += exp_earned_for_current_battle
    if exp_collected >= exp_needed:
        print(f"Player successfully collected his needed experience for {battles_counter} battles.")
        break

if exp_collected < exp_needed:
    print(f"Player was not able to collect the needed experience, {exp_needed - exp_collected:.2f} more needed.")