#include <fstream>

using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100001];
int p;

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


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;
    }


int main()
{f>>s;
p=0;
g<<expresie();


    return 0;
}