python(中间有几个空格

n=list(input())
c=1
d=0
e=0
for i in n:
if i!=" ":
if c= =1:
if d= =0:
a=int(i)
d=1
elif d= =1:
a*=10
a+=int(i)
else:
if e= =0:
b=int(i)
e=1
elif e= =1:
b*=10
b+=int(i)
elif i==" ":
c=2
print(a+b)