#include <iostream>
#include <fstream>

using namespace std;

ifstream fi("evaluare.in");
ofstream fo("evaluare.out");

char s[100000];
int p;

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

int main()
{
    fi.get(s,100000);
    fo<<expresie();
    return 0;
}

int expresie()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
    if(s[p]=='+'){
        p++;
        sum+=termen();
    }
    else{
        p++;
        sum-=termen();
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    if(s[p]=='*'){
        p++;
        prod*=factor();
    }
    else{
        p++;
        prod/=factor();
    }
    return prod;
}
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');
        p++;
    }
    return semn*val;
}