#include<cstdio>

#define IsNum(c) ((int)(c-'0') < 10) && (((int)(c-'0')) >= 0)

int getNumber(char &c)
{
    int k = (int)(c-'0');

    do {
        scanf("%c",&c);
        if (IsNum(c)) k = k*10 + (int)(c-'0');
    } while ( IsNum(c));

    return k;
}

int addOperator(char op)
{
    if (op == '+') return 1000000001;
    else if (op == '-') return 1000000002;
    else if (op == '*') return 1000000003;
    else if (op == '/') return 1000000004;
    else return 1000000005;
}

int priority(char op)
{
    if ( op=='*' || op=='/')
        return 2;
    else if ( op=='+' || op=='-')
        return 1;
    else return 0;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);

    char c;

    int pf[50000];
    int solution[50000];
    int soli = -1;
    char st[50000];
    int sti = -1,pfi = -1;

    scanf("%c",&c);

    do
    {
        if ( IsNum(c) )
            pf[++pfi] = getNumber(c);
        else if (c=='(')
        {
            st[++sti] = c;
            scanf("%c",&c);
        }
        else if (c==')')
        {
            while (st[sti]!='(')
                pf[++pfi] = addOperator(st[sti--]);
            scanf("%c",&c);
        }
        else
        {
            if (sti == -1)
                st[++sti] = c;
            else
            {
                while ( (sti!=-1) && (priority(st[sti]) >= priority(c)) )
                    pf[++pfi] = addOperator(st[sti]),--sti;
                st[++sti] = c;
            }
            scanf("%c",&c);
        }
    }
    while (!feof(stdin));

    while (sti!=-1)
        pf[++pfi] = addOperator(st[sti--]);

    for (int i=0;i<=pfi;++i)
    {
        if (pf[i]<=1000000000)
            solution[++soli] = pf[i];
        else switch (pf[i])
        {
        case 1000000001: solution[soli-1]+=solution[soli],--soli; break;
        case 1000000002: solution[soli-1]-=solution[soli],--soli; break;
        case 1000000003: solution[soli-1]*=solution[soli],--soli; break;
        case 1000000004: solution[soli-1]/=solution[soli],--soli; break;
        }
    }

    printf("%d",solution[0]);

    return 0;
}