Python3 代码

n = int(input())

# using dictionary
names = { 61: "Brasilia",
        71 : "Salvador", 
        11 : "Sao Paulo", 
        21 : "Rio de Janeiro",
        32 : "Juiz de Fora", 
        19 : "Campinas",
        27: "Vitoria",
        31 : "Belo Horizonte"}

if n in names:
    print (names.get(n))
else:
    print ("DDD nao cadastrado");