백준 1874 파이썬

i= int(input())

a=[]

b=[]

index=1

for i in range(i):

num = int(input())

if (index==1) or (len(a)==1) or (len(a)==0) or (a[-1] <= num) :

while index <= num:

b.append("+")

a.append(index)

index+=1

a.pop()

b.append("-")

if len(a)==0:

for i in range(len(b)):

print(b[i])

else:

print("No")