#include<cstdio>
#include<cstring>
char s[100010],*p=s;
int eval();



int factor()
{
    int r=0;
    if(*p=='(')
    {
        ++p;
        r=eval();
        ++p;
    }
    else
    {
        while(*p>='0'&&*p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    }
    return r;
}




int termen()
{
    int r=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            ++p;
            r*=factor();
        }
        if(*p=='/')
        {
            ++p;
            r/=factor();
        }
    }
    return r;
}


int eval()
{
    int r=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            ++p;
            r+=termen();
        }
        if(*p=='-')
        {
            ++p;
            r-=termen();
        }
    }
    return r;
}



int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(s);
    printf("%d\n",eval());
    return 0;
}