#include <iostream>
#include <cstdio>

using namespace std;

const int N=100000+5;

int n,p;
char s[N];

inline int expresie();
inline int factor();
inline int termen();

inline int expresie()
{
    int ans=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        p++;
        if(s[p-1]=='+')
        {
            ans+=termen();
        }
        else
        {
            ans-=termen();
        }
    }
    return ans;
}

inline int termen()
{
    int ans=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        p++;
        if(s[p-1]=='*')
        {
            ans*=factor();
        }
        else
        {
            ans/=factor();
        }
    }
    return ans;
}

inline int factor()
{
    int semn=1;
    int val=0;
    while(s[p]=='-')
    {
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    else
    {
        while('0'<=s[p] && s[p]<='9')
        {
            val=10*val+s[p]-'0';
            p++;
        }
        return semn*val;
    }
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    cin.getline(s,N);
    cout<<expresie()<<"\n";
    return 0;
}
/**


**/