#include <bits/stdc++.h>

using namespace std;

int main()

{

string s;

int i=1,n,z;

cin>>s;

z=s[0]-48;n=s.length();

while(i<n)

{

if(s[i]=='+') z=z+(s[i+1]-48);

else if(s[i]=='-') z=z-(s[i+1]-48);

else if(s[i]=='*') z=z*(s[i+1]-48);

else z=z/(s[i+1]-48);

i=i+2;

}

cout<<z<<endl;

return 0;

}