#include <cstdio>

using namespace std;
char s[100005];
int p;
int termen();
int factor();
int expresie()
{
    int val=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            val=val+termen();
        }
        if(s[p]=='-')
        {
            p++;
            val=val-termen();
        }
    }
    return val;
}
int termen()
{
    int val=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            val=val*factor();
        }
        if(s[p]=='/')
        {
            p++;
            val=val/factor();
        }
    }
    return val;
}
int factor()
{
    int val=0,semn=1;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return val*semn;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return val*semn;
}
int main()
{
    FILE *in,*out;
    in=fopen("evaluare.in","r");
    out=fopen("evaluare.out","w");
    int ras;
    fscanf(in,"%s",&s);
    ras=expresie();
    fprintf(out,"%d",ras);
    return 0;
}