#20130381 최수빈
def population_density(name, l):
    p=l[0]/l[1]
    if p>=1000 :
        print('%s is very densely populated'%name)
    elif p>=500 :
       print('%s is densely populated'%name)
    elif p>=300 :
        print('%s is normally populated'%name)
    elif p>=100 :
        print('%s is sparsely populated'%name)
    elif p>=300:
        print('%s is very sparsely populated'%name)



#main
f=open('population.txt')
country={}
for line in f:
    items = line.split()
    key, values = items[0], items[1:]
    country[key]=values

for key,values in country.items():
    population_density(key, values)