#include <bits/stdc++.h>

using namespace std;

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

int n,i;
char s[100200];

int expresie();
int termen();
int factor();
int numar();

int expresie()
{
    int x=termen();
    while(s[i]=='+' or s[i]=='-')
    {
        if(s[i]=='+')
            i++, x+=termen();
        else
            i++, x-=termen();
    }
    return x;
}

int termen()
{
    int x=factor();
    while(s[i]=='*' or s[i]=='/')
    {
        if(s[i]=='*')
            i++, x*=factor();
        if(s[i]=='/')
            i++, x/=factor();
    }
    return x;
}

int factor()
{
    int x;
    if(s[i]=='(')
        i++, x=expresie(), i++;
    else
        x=numar();
    return x;
}

int numar()
{
    int x=0;
    while(isdigit(s[i]))
        x=x*10+(s[i++]-'0');
    return x;
}

int32_t main()
{
    f>>s, n=strlen(s);
    g<<expresie();
    return 0;
}