problem 2

train_length = int(input())
train = [0] * train_length

command = input()

while "End" not in command:
    text = command.split()
    if "add" in command:
        train[-1] += int(text[1])
    elif "insert" in command:
        train[int(text[1])] += int(text[2])
    elif "leave" in command:
        train[int(text[1])] -= int(text[2])

    command = input()

print(train)