#coding: utf-8
##yuki_222

sl=list(raw_input())

if sl[0]=='+':
 sl[0]='-'
elif sl[0]=='-':
 sl[0]='+'

for i in xrange(len(sl)-1):
 if sl[i]=='+' and sl[i+1]=='+':
  sl[i]='-'
  sl[i+1]='X'
 elif sl[i]=='-' and sl[i+1]=='-':
  sl[i]='-'
  sl[i+1]='X'
  
 elif sl[i]=='+' and sl[i+1]=='-':
  sl[i]='+'
  sl[i+1]='X'
 elif sl[i]=='-' and sl[i+1]=='+':
  sl[i]='+'
  sl[i+1]='X'
 elif sl[i]=='-':
  sl[i]='+'
 elif sl[i]=='+':
  sl[i]='-'
 
rt=""
for i in xrange(len(sl)):
 if sl[i]!='X':
  rt+=sl[i]

res=eval(rt)
print res