#include <iostream>
#include <stdio.h>
using namespace std;

const int N=100001;
char s[N];
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 val=0, semn=1;
    while(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn * val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn * val;
}




int main()
{
    FILE *in, *out;
    in=fopen("evaluare.in","r");
    out=fopen("evaluare.out","w");
    fgets(s,N,in);
    fprintf(out,"%d",expresie());
    return 0;
}