import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

n = readline().rstrip().decode()
a = int(n[0])
b = int(n[1])
c = len(n) - 1
b += 1 if int(n[2]) >= 5 else 0
if b == 10:
    b = 0
    a += 1
if a == 10:
    c += 1
    a = 1
print(f'{a}.{b}*10^{c}')