#include<cstdio>
#include<cstring>
#include<algorithm>
#define M -2000000000
#include<queue>
using namespace std;
FILE *f=fopen("evaluare.in","r");
FILE *g=fopen("evaluare.out","w");
char aux[100002],c;
struct kkt
{
    int pr;
    int pozz;
}auxx;
struct cmp
{
    bool operator() (kkt a,kkt b)
    {
        if(a.pr<b.pr) return true;
        else if(a.pr==b.pr) return a.pozz>b.pozz;
                else return false;
    }
};
priority_queue<kkt,vector<kkt>,cmp>v;
int p,val[100002],k,nr,kk;
int valoare(int a,char c,int b)
{
    if(c=='+') return a+b;
    if(c=='/') return a/b;
    if(c=='*') return a*b;
    if(c=='-') return a-b;

    return 0;
}
int construire()
{
    int poz,j,i,sol;
    while(!v.empty())
    {
    poz=v.top().pozz;
    i=poz;
    while(val[i]==M)i--;
    j=poz;
    while(val[j]==M)j++;
    val[poz]=valoare(val[i],aux[poz],val[j]);
    sol=val[poz];
    v.pop();
    val[i]=M;
    val[j]=M;
    }
    return sol;
}
int main()
{
    unsigned int i;

    for(i=1;i<=100001;i++)val[i]=M;
    fscanf(f,"%c",&c);
    while(!feof(f))
    {
    if('0'<=c&&c<='9')
        {
            nr=0;
            while('0'<=c&&c<='9'&&!feof(f))
            {
                nr=nr*10+c-'0';fscanf(f,"%c",&c);
            }

            ++k;
            val[k]=nr;
        }
    else fscanf(f,"%c",&c);
    if(c=='-'||c=='+')
        {k++;
        auxx.pozz=k;
        auxx.pr=p+1;
        v.push(auxx);
        aux[k]=c;
        }
    if(c=='*'||c=='/')
        {
        k++;
        auxx.pozz=k;
        auxx.pr=p+2;
        v.push(auxx);
        aux[k]=c;
        }
    if(c=='('){p+=3;++k;}
    if(c==')'){p-=3;++k;}

    }
    fprintf(g,"%d",construire());
    return 0;
}