01. Counter-Strike

energy = int(input())
count = 0

command = input()

while command != "End of battle":
    index = int(command)
    if energy < index:
        break
    count += 1
    if count % 3 == 0:
        energy += count
    energy -= index
    command = input()

if command == "End of battle":
    print(f"Won battles: {count}. Energy left: {energy}")
else:
    print(f"Not enough energy! Game ends with {count} won battles and {energy} energy")