#include<stdio.h>
char a[110000];
int i=1,n;
int termen();
int factor();
int eval()
{
    int sol=termen();
    while(a[i]=='+'||a[i]=='-')
    {
        if(a[i]=='+')
        {
            i++;
            sol+=termen();
        }
        else
        {
            i++;
            sol-=termen();
        }
    }
    return sol;
}
int termen()
{
    int sol=factor();
    while(a[i]=='*'||a[i]=='/')
    {
        if(a[i]=='*')
        {
            i++;
            sol*=factor();
        }
        else
        {
            i++;
            sol/=factor();
        }
    }
    return sol;
}
int factor()
{
    int sol=0;
    if(a[i]=='(')
    {
        i++;
        sol=eval();
        i++;
    }
    else
        while(a[i]>='0' && a[i]<='9')
        {
            sol=sol*10+a[i]-'0';
            i++;
        }
    return sol;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    while(scanf("%c",&a[++n])!=EOF);
    printf("%d",eval());
    return 0;
}