D = 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991
n = int(input())
D *= n
s = str(D)
s = s[:-190] + '.' + s[-190:]
if s [0] == '.':
    s = '0' + s
print(s)