import sys

N = sys.stdin.readline().strip()
a, b, c = int(N[0]), int(N[1]), len(N) - 1
if int(N[2]) >= 5:
    b += 1
if b == 10:
    b = 0
    a += 1
if a == 10:
    a, b = 1, 0
    c += 1
print(f"{a}.{b}*10^{c}")