D = 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991
DS = str(D)
DL = len(DS)
N = int(input())
X = D * N
XS = str(X)
XL = len(XS)
print(XS[0:XL-DL] + '.' + XS[XL-DL:])