def main():
decayConstant = input('What is the value of the decay constant: ')
size = input('What size should the list of nuclei be: ')
timeInterval = input(
'At what time interval should the simulation be run (mins): ')
print('Beginning simulation...')
sample = Sample(size, decayConstant)
elapsedTime = 0.0
while sample.getDecayedNuclei() < sample.getUndecayedNuclei():
sample.stepForward(timeInterval)
elapsedTime = elapsedTime + timeInterval
sample.show()
print('Simulation complete. There remain ' +
str(sample.getDecayedNuclei()) + ' decayed nuclei and ' +
str(sample.getUndecayedNuclei()) + ' undecayed nuclei.')
print('The total elapsed time is ' + str(elapsedTime) + ' minutes.')
