#include <iostream>
#include<fstream>
using namespace std;

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

char s[100005];
int p;
int termen();
int expresie();
int factor();

int expresie()
{
    int val=termen();
    while(s[p]=='+' || s[p]=='-')
        if(s[p]=='+'){
            p++;
            val+=termen();
        }else{
            p++;
            val-=termen();
        }
    return val;
}
int termen()
{
    int val=factor();
    while(s[p]=='*' || s[p]=='/')
    if(s[p]=='*'){
        p++;
        val*=factor();
    }
    else{
        p++;
        val/=factor();
    }
    return val;
}
int factor(){
    int val=0,semn=1;
    while(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val = expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10+s[p++]-'0';
    }
    return semn * val;
}
int main()
{
    int i=1;
    f>>s;
    g<<expresie();
    return 0;
}