#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>

using namespace std;

char s[100006];
int p;

int prod();
int termen();

int suma()
{
    int r = prod();
    while(s[p]=='+' || s[p]=='-'){
        p++;
        if(s[p-1] == '+')
            r+=prod();
        else
            r-=prod();
    }
    return r;
}

int prod()
{
    int f = termen();
    while(s[p]=='*'||s[p]=='/'){
        p++;
        if(s[p-1] == '*')
            f*=termen();
        else
            f/=termen();
    }
    return f;
}

int termen()
{
    int t=0;
    if(s[p]=='('){
        p++;
        t=suma();
        p++;
    }
    else
        while(s[p]>='0' && s[p]<='9')
            t=t*10+s[p++]-'0';
    return t;
}

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

    gets(s);
    printf("%d", suma());
    return 0;
}