def rgb_to_cmyk(rgb_dict):
  rval = rgb_dict['R']
  gval = rgb_dict['G']
  bval = rgb_dict['B']
  rprime = rval/255
  gprime = gval/255
  bprime = bval/255
  kprime = 1-max([rprime,gprime,bprime])
  cval = round(100*(1-rprime-kprime)/(1-kprime))
  mval = round(100*(1-gprime-kprime)/(1-kprime))
  yval = round(100*(1-bprime-kprime)/(1-kprime))
  kval = round(100*kprime)
  return {'C':cval, 'M':mval, 'Y':yval, 'K':kval}

def main():
  print()
  while True:
    print("RGB To CMYK Converter")
    rval = input("Enter the Red Color Value (enter quit or q to quit): ")
    if rval == 'quit' or rval == 'q':
      break
    rval = int(rval)
    gval = int(input("Enter the Green Color Value: "))
    bval = int(input("Enter the Blue Color Value: "))
    rgb_dict = {'R':rval, 'G':gval, 'B':bval}
    cmyk_dict = rgb_to_cmyk(rgb_dict)
    cval = cmyk_dict['C']
    mval = cmyk_dict['M']
    yval = cmyk_dict['Y']
    kval = cmyk_dict['K']
    print()
    print("CMYK Values")
    print("Cyan:",cval)
    print("Magenta:",mval)
    print("Yellow:",yval)
    print("Key (Black):",kval)
    print()

main()