01. Counter Strike

initial_energy = int(input())
enemy_distance = input()
won_battles = 0
win = True

while initial_energy > 0 or not enemy_distance == "End of battle":
    enemy_distance = input()
    if enemy_distance.isnumeric():
        needed_energy = int(enemy_distance)
        if initial_energy >= needed_energy:
            initial_energy -= needed_energy
            won_battles += 1
            if won_battles % 3 == 0:
                won_battles += won_battles
    else:
        print(f"Not enough energy! Game ends with {won_battles} won battles and {initial_energy} energy")
        win = False
        break

if win:
    print(f"Won battles: {won_battles}. Energy left: {initial_energy}")