#include <bits/stdc++.h>
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout("evaluare.out");
string s;
int i;
int term(),fact();
int expresie()
{
    int sum=term();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+')
            i++,sum+=term();
        else i++,sum-=term();
    }
    return sum;
}
int term()
{
    int prod=fact();
    while(s[i]=='*' || s[i]=='/')
    {
        if(s[i]=='*')
            i++,prod*=fact();
        else i++,prod/=fact();
    }
    return prod;
}
int fact()
{
    int semn=1,val=0;
    while(s[i]=='-')
        semn=-semn;
    if(s[i]=='(')
    {
        i++;
        val=expresie();
        i++;
        return semn*val;
    }
    while(s[i]>='0' && s[i]<='9')
        val=val*10+s[i++]-'0';
    return val*semn;
}
int main()
{
    fin>>s;
    fout<<expresie();
    return 0;
}