counter-strike

initial_energy = int(input())

command = input()
count = 0
not_enough_energy = False
while not command == 'End of battle':
    distance = int(command)
    if initial_energy - distance >= 0:
        initial_energy -= distance
        count += 1
        if count % 3 == 0:
            initial_energy += count
    else:
        print(f'Not enough energy! Game ends with {count} won battles and {initial_energy} energy')
        not_enough_energy = True
        break

    command = input()
if not not_enough_energy:
    print(f'Won battles: {count}. Energy left: {initial_energy}')