s = input()

a = int(s[0])
b = int(s[1])
c = len(s) - 1

if s[2] >= "5":
    b += 1
    if b >= 10:
        a += 1
        b = 0
        if a >= 10:
            a = 1
            c += 1

print(f'{a}.{b}*10^{c}')