Multiplication sigh

num_1=int(input())
num_2=int(input())
num_3=int(input())

count=0
zero=False

new_list=[num_1,num_2,num_3]
for i in range(len(new_list)):
    if num_3==0 or num_2==0 or num_1==0:
        zero=True
        break
    elif new_list[i]<0:
        count+=1

if count==1 or count==3:
    print("negative")
elif zero:
    print("zero")
else:
    print("positive")