n = input().strip()
if n.startswith('-'):
    print(0)
else:
    stripped = n.lstrip('0')
    if not stripped:
        stripped = '0'
    if len(stripped) < 3:
        print(0)
    else:
        q_str = stripped[:-2]
        q_stripped = q_str.lstrip('0') or '0'
        q = int(q_stripped)
        print(q)