a = input()
a = a[::-1]
if a[-1] == '-':
    for i in a:
        if i == '0':
            a = str(a)[:-1]
            a = 0 - int(a)
            print(a)
            break
else:
    for i in a:
        if i == '0':
            a = int(a)
    print(a)