#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

ifstream f("expresie.in");
ofstream g("expresie.out");

int main()
{
    char s[100000], fp[100000], st[100000], x;
    unsigned i=1, vf=-1, k=0;
    long int rez, stv[100000];
    s[0]='(';
    while (f>>x) s[i++]=x;
    s[i]=')';

    for (i=0; i<strlen(s); i++)
    { if (s[i]=='(' || s[i]=='*' || s[i]=='/') { st[++vf]=s[i]; continue; }

    if (s[i]>='0' && s[i]<='9') {
        while (s[i]>='0' && s[i]<='9') fp[k++]=s[i++];
        i--;
        fp[k++]=' ';
        continue; }

    if (s[i]==')') {
        while (st[vf]!='(') { fp[k++]=st[vf--]; fp[k++]=' '; }
        vf--;
        continue; }

    if (s[i]=='+' || s[i]=='-') {
            if (st[vf]=='*' || st[vf]=='/')
            { while (st[vf]=='*' || st[vf]=='/' || st[vf]=='+' || st[vf]=='-') { fp[k++]=st[vf--]; fp[k++]=' '; } }
            st[++vf]=s[i];
            continue; }
    }
    vf=-1;
    for (i=0; i<=k; i++)
    { if (fp[i]==' ') continue;
    if (fp[i]>='0' && fp[i]<='9')
         { rez=0;
           while (fp[i]>='0' && fp[i]<='9') rez=rez*10+(fp[i++]-'0');
           stv[++vf]=rez;
           continue; }
    if (fp[i]=='+') { stv[--vf]=stv[vf]+stv[vf+1]; continue; }
    if (fp[i]=='-') { stv[--vf]=stv[vf]-stv[vf+1]; continue; }
    if (fp[i]=='/') { stv[--vf]=stv[vf]/stv[vf+1]; continue; }
    if (fp[i]=='*') { stv[--vf]=stv[vf]*stv[vf+1]; continue; }
    }
    g<<stv[vf];

    f.close();
    g.close();
    return 0;
}