#include <fstream>

using namespace std;

const int N=100000;

char s[N+1];
int p;

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

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

int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
        if(s[p]=='*')
            p++,prod*=factor();
        else
            p++,prod/=factor();
    return prod;
}

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

int main()
{
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    cin.getline(s,100002);
    cout<<expresie();
    return 0;
}