```cpp
#include <bits/stdc++.h>
using namespace std;
int main( int argc, char** argv ){
long long j,i,ans=0;
char f;
cin>>i;
ans+=i;
while(cin>>f>>i){
if(f=='+') ans+=i;
if(f=='-') ans-=i;
}
cout<<ans;
return 0;
}
```
by ArcaStellar @ 2017-10-17 18:45:57