valor = float(input())
if valor >= 0 and valor <= 25:
print('Intervalo (0,25]')
elif valor > 25 and valor <= 50:
print('Intervalo (25,50]')
elif valor > 50 and valor <= 75:
print('Intervalo (50,75]')
elif valor > 75 and valor <= 100:
print('Intervalo (75,100]')
elif valor < 0:
print('Fora de intervalo')
Como resolver esse erro ValueError: could not convert string to float.