from time import time

n = 10**5
list = []


def main():
    start_time = time()
    for x in range(1, n):
        list.append(x)
    end_time = time()
    print(end_time - start_time)

    start_time = time()
    for x in list:
        list.pop()
    end_time = time()
    print(end_time - start_time)


if __name__ == "__main__":
    main()