#include<cstdio>
char s[100000+10],*p;
inline int eval();
inline 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;
}
inline int termen()
{
    int r=factor();
    while(*p=='*'||*p=='/')
    {
        if(*(p++)=='*')
            r*=factor();
        else
            r/=factor();
    }
    return r;
}
inline int eval()
{
    int r=termen();
    while(*p=='+' || *p=='-')
    {
        if(*(p++) =='+')
            r+=termen();
        else
            r-=termen();
    }
    return r;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);

    fgets(s,sizeof(s),stdin);

    p=s;
    fprintf(stdout,"%d\n",eval());

}