print ('Color S RGB  to Linear RFB')
print ()



def s2lin(x):
 a = 0.055
 if x <=0.04045 :
  y = x * (1.0 / 12.92)
 else:
  y = pow( (x + a) * (1.0 / (1 + a)), 2.4)
 return y

x = 0.1

z = s2lin(x)

print ('x =', x, 'z =',z)
print ()

print ('Linear RGB  to   S RGB')
print ()

def lin2s(x):
 a = 0.055
 if x <=0.0031308:
  y = x * 12.92
 else:
  y = (1 + a) * pow(x, 1 / 2.4) - a
 return y

x = 0.1

z = lin2s(x)

print ('x =', x, 'z =',z)

print ()