01. Counter Strike

energy = int(input())
distance = input()

won_battles = 0

while True:
    if distance == "End of battle":
        print(f"Won battles: {won_battles}. Energy left: {energy}")
        break
    else:
        distance_1 = int(distance)

        if energy < distance_1 or energy == 0:
            print(f"Not enough energy! Game ends with {won_battles} won battles and {energy} energy")
            break
        else:
            energy -= distance_1
            won_battles += 1

        if won_battles % 3 == 0:
            energy += won_battles

    distance = input()