#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[10000];
int i;
int expresie();
int termen();
int factor();
int numar();
int expresie()
{int r=termen();
while(s[i]=='+' || s[i]=='-')
{if(s[i]=='+')
{i++;r+=termen();}
else {i++;r-=termen();}
}
return r;
}
int termen()
{int r=factor();
while(s[i]=='*' || s[i]=='/')
{if(s[i]=='*')
{i++;r+=factor();}
else {i++;r-=factor();}
}
return r;
}
int factor()
{int r;
if(s[i]=='('){i++;r=expresie();}
else {r=numar();}
return r;
}
int numar()
{int r=0;
while(s[i]>='0' && s[i]<='9'){r=r*10+(s[i]-'0');i++;}
return r;
}
int main()
{fin>>s;
i=0;
fout<<expresie();
return 0;
}